Elements Of Periodic Table And Their Properties
Hydrogen (H) *
Atomic Number: 1
Atomic Mass: 1.008 u
Category: Non-metal
Group: 1, Period 1
Electron Configuration: 1s¹
Properties:
Lightest element
Colorless, odorless, highly flammable gas
Used in fuel cells, rocket fuel
---
Helium (He) *
Atomic Number: 2
Atomic Mass: 4.0026 u
Category: Noble Gas
Group: 18, Period 1
Electron Configuration: 1s²
Properties:
Inert gas, non-reactive
Colorless, odorless
Used in balloons, cryogenics, nuclear reactors
---
Lithium (Li) *
Atomic Number: 3
Atomic Mass: 6.94 u
Category: Alkali Metal
Group: 1, Period 2
Electron Configuration: [He] 2s¹
Properties:
Soft, silvery-white metal
Used in batteries and medication for bipolar disorder
---
Beryllium (Be) *
Atomic Number: 4
Atomic Mass: 9.0122 u
Category: Alkaline Earth Metal
Group: 2, Period 2
Electron Configuration: [He] 2s²
Properties:
Hard, brittle metal
Used in aerospace, X-ray equipment
---
Boron (B) *
Atomic Number: 5
Atomic Mass: 10.81 u
Category: Metalloid
Group: 13, Period 2
Electron Configuration: [He] 2s² 2p¹
Properties:
Semi-conductor
Used in glass, ceramics, and detergents
---
Carbon (C) *
Atomic Number: 6
Atomic Mass: 12.011 u
Category: Non-metal
Group: 14, Period 2
Electron Configuration: [He] 2s² 2p²
Properties:
Basis of organic chemistry
Exists in allotropes like diamond and graphite
---
Nitrogen (N) *
Atomic Number: 7
Atomic Mass: 14.007 u
Category: Non-metal
Group: 15, Period 2
Electron Configuration: [He] 2s² 2p³
Properties:
Colorless, odorless gas
Makes up 78% of Earth's atmosphere
Used in fertilizers and explosives
---
Oxygen (O) *
Atomic Number: 8
Atomic Mass: 15.999 u
Category: Non-metal
Group: 16, Period 2
Electron Configuration: [He] 2s² 2p⁴
Properties:
Supports combustion
Essential for respiration
---
Fluorine (F) *
Atomic Number: 9
Atomic Mass: 18.998 u
Category: Halogen
Group: 17, Period 2
Electron Configuration: [He] 2s² 2p⁵
Properties:
Most electronegative element
Highly reactive
Used in toothpaste and refrigerants
---
Neon (Ne) *
Atomic Number: 10
Atomic Mass: 20.180 u
Category: Noble Gas
Group: 18, Period 2
Electron Configuration: [He] 2s² 2p⁶
Properties:
Inert, non-reactive gas
Used in neon signs
Sodium (Na) *
Atomic Number: 11
Atomic Mass: 22.990 u
Category: Alkali Metal
Group: 1, Period 3
Electron Configuration: [Ne] 3s¹
Properties:
Soft, silvery metal
Highly reactive, especially with water
Used in table salt and streetlights
---
Magnesium (Mg) *
Atomic Number: 12
Atomic Mass: 24.305 u
Category: Alkaline Earth Metal
Group: 2, Period 3
Electron Configuration: [Ne] 3s²
Properties:
Lightweight, strong metal
Used in aerospace and automotive industries
---
Aluminum (Al) *
Atomic Number: 13
Atomic Mass: 26.9815 u
Category: Post-transition Metal
Group: 13, Period 3
Electron Configuration: [Ne] 3s² 3p¹
Properties:
Lightweight, corrosion-resistant
Used in packaging, construction, and aerospace
---
Silicon (Si) *
Atomic Number: 14
Atomic Mass: 28.085 u
Category: Metalloid
Group: 14, Period 3
Electron Configuration: [Ne] 3s² 3p²
Properties:
Semiconductor
Used in electronics and solar panels
---
Phosphorus (P) *
Atomic Number: 15
Atomic Mass: 30.973 u
Category: Non-metal
Group: 15, Period 3
Electron Configuration: [Ne] 3s² 3p³
Properties:
Found in several allotropes (white, red)
Used in fertilizers, matches, and explosives
---
Sulfur (S) *
Atomic Number: 16
Atomic Mass: 32.06 u
Category: Non-metal
Group: 16, Period 3
Electron Configuration: [Ne] 3s² 3p⁴
Properties:
Yellow, odorless solid
Used in vulcanization of rubber and sulfuric acid production
---
Chlorine (Cl) *
Atomic Number: 17
Atomic Mass: 35.45 u
Category: Halogen
Group: 17, Period 3
Electron Configuration: [Ne] 3s² 3p⁵
Properties:
Greenish-yellow gas, highly reactive
Used in disinfectants and bleach
---
Argon (Ar) *
Atomic Number: 18
Atomic Mass: 39.948 u
Category: Noble Gas
Group: 18, Period 3
Electron Configuration: [Ne] 3s² 3p⁶
Properties:
Inert, non-reactive gas
Used in lighting and welding
---
Potassium (K) *
Atomic Number: 19
Atomic Mass: 39.10 u
Category: Alkali Metal
Group: 1, Period 4
Electron Configuration: [Ar] 4s¹
Properties:
Soft, silvery-white metal
Highly reactive, especially with water
Important for plant growth and human nutrition
---
Calcium (Ca) *
Atomic Number: 20
Atomic Mass: 40.078 u
Category: Alkaline Earth Metal
Group: 2, Period 4
Electron Configuration: [Ar] 4s²
Properties:
Essential for bones and teeth in humans
Used in cement and plaster
---
Scandium (Sc) *
Atomic Number: 21
Atomic Mass: 44.9559 u
Category: Transition Metal
Group: 3, Period 4
Electron Configuration: [Ar] 3d¹ 4s²
Properties:
Lightweight metal
Used in aerospace materials and sports equipment
---
Titanium (Ti) *
Atomic Number: 22
Atomic Mass: 47.867 u
Category: Transition Metal
Group: 4, Period 4
Electron Configuration: [Ar] 3d² 4s²
Properties:
Strong, corrosion-resistant
Used in aerospace, medical implants, and jewelry
---
Vanadium (V) *
Atomic Number: 23
Atomic Mass: 50.9415 u
Category: Transition Metal
Group: 5, Period 4
Electron Configuration: [Ar] 3d³ 4s²
Properties:
Strengthens steel
Used in tools, armor, and jet engines
---
Chromium (Cr) *
Atomic Number: 24
Atomic Mass: 51.996 u
Category: Transition Metal
Group: 6, Period 4
Electron Configuration: [Ar] 3d⁵ 4s¹
Properties:
Shiny, hard metal
Used in stainless steel and chrome plating
---
Manganese (Mn) *
Atomic Number: 25
Atomic Mass: 54.938 u
Category: Transition Metal
Group: 7, Period 4
Electron Configuration: [Ar] 3d⁵ 4s²
Properties:
Hard and brittle metal
Used in steelmaking and batteries
---
Iron (Fe) *
Atomic Number: 26
Atomic Mass: 55.845 u
Category: Transition Metal
Group: 8, Period 4
Electron Configuration: [Ar] 3d⁶ 4s²
Properties:
Essential for hemoglobin in blood
Widely used in construction and manufacturing
---
Cobalt (Co) *
Atomic Number: 27
Atomic Mass: 58.933 u
Category: Transition Metal
Group: 9, Period 4
Electron Configuration: [Ar] 3d⁷ 4s²
Properties:
Used in batteries and magnets
Important for vitamin B12
---
Nickel (Ni) *
Atomic Number: 28
Atomic Mass: 58.6934 u
Category: Transition Metal
Group: 10, Period 4
Electron Configuration: [Ar] 3d⁸ 4s²
Properties:
Corrosion-resistant metal
Used in coins, batteries, and stainless steel
---
Copper (Cu) *
Atomic Number: 29
Atomic Mass: 63.546 u
Category: Transition Metal
Group: 11, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s¹
Properties:
Excellent conductor of electricity and heat
Used in wiring, plumbing, and coins
---
Zinc (Zn) *
Atomic Number: 30
Atomic Mass: 65.38 u
Category: Transition Metal
Group: 12, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s²
Properties:
Corrosion-resistant
Used in galvanizing steel and batteries
---
Gallium (Ga) *
Atomic Number: 31
Atomic Mass: 69.723 u
Category: Post-transition Metal
Group: 13, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p¹
Properties:
Melts in hand
Used in semiconductors and LEDs
---
Germanium (Ge) *
Atomic Number: 32
Atomic Mass: 72.63 u
Category: Metalloid
Group: 14, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p²
Properties:
Semiconductor
Used in electronics and fiber optics
---
Arsenic (As) *
Atomic Number: 33
Atomic Mass: 74.9216 u
Category: Metalloid
Group: 15, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p³
Properties:
Poisonous
Used in pesticides and semiconductors
---
Selenium (Se) *
Atomic Number: 34
Atomic Mass: 78.96 u
Category: Non-metal
Group: 16, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p⁴
Properties:
Used in photocopiers, glass, and supplements
---
Bromine (Br) *
Atomic Number: 35
Atomic Mass: 79.904 u
Category: Halogen
Group: 17, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p⁵
Properties:
Reddish-brown liquid
Used in flame retardants and water treatment
---
Krypton (Kr) *
Atomic Number: 36
Atomic Mass: 83.798 u
Category: Noble Gas
Group: 18, Period 4
Electron Configuration: [Ar] 3d¹⁰ 4s² 4p⁶
Properties:
Inert, non-reactive gas
Used in lighting and photography
---
Rubidium (Rb) *
Atomic Number: 37
Atomic Mass: 85.4678 u
Category: Alkali Metal
Group: 1, Period 5
Electron Configuration: [Kr] 5s¹
Properties:
Soft, highly reactive metal
Used in research and electronics
---
Strontium (Sr) *
Atomic Number: 38
Atomic Mass: 87.62 u
Category: Alkaline Earth Metal
Group: 2, Period 5
Electron Configuration: [Kr] 5s²
Properties:
Reacts with water
Used in fireworks and medical imaging
---
Yttrium (Y) *
Atomic Number: 39
Atomic Mass: 88.9058 u
Category: Transition Metal
Group: 3, Period 5
Electron Configuration: [Kr] 4d¹ 5s²
Properties:
Used in electronics, lasers, and superconductors
---
Zirconium (Zr) *
Atomic Number: 40
Atomic Mass: 91.224 u
Category: Transition Metal
Group: 4, Period 5
Electron Configuration: [Kr] 4d² 5s²
Properties:
Corrosion-resistant
Used in nuclear reactors and jewelry
---
Niobium (Nb) *
Atomic Number: 41
Atomic Mass: 92.9064 u
Category: Transition Metal
Group: 5, Period 5
Electron Configuration: [Kr] 4d⁴ 5s¹
Properties:
Strengthens steel
Used in jet engines and superconductors
---
Molybdenum (Mo) *
Atomic Number: 42
Atomic Mass: 95.95 u
Category: Transition Metal
Group: 6, Period 5
Electron Configuration: [Kr] 4d⁵ 5s¹
Properties:
Strengthens steel
Used in alloys and catalysis
---
Technetium (Tc) *
Atomic Number: 43
Atomic Mass: 98 u (radioactive)
Category: Transition Metal
Group: 7, Period 5
Electron Configuration: [Kr] 4d⁵ 5s²
Properties:
Radioactive
Used in medical imaging
---
Ruthenium (Ru) *
Atomic Number: 44
Atomic Mass: 101.07 u
Category: Transition Metal
Group: 8, Period 5
Electron Configuration: [Kr] 4d⁷ 5s¹
Properties:
Used in electronics and catalysts
---
Rhodium (Rh) *
Atomic Number: 45
Atomic Mass: 102.91 u
Category: Transition Metal
Group: 9, Period 5
Electron Configuration: [Kr] 4d⁸ 5s¹
Properties:
Highly reflective
Used in catalytic converters and jewelry
---
Palladium (Pd) *
Atomic Number: 46
Atomic Mass: 106.42 u
Category: Transition Metal
Group: 10, Period 5
Electron Configuration: [Kr] 4d¹⁰
Properties:
Used in catalytic converters and electronics
---
Silver (Ag) *
Atomic Number: 47
Atomic Mass: 107.87 u
Category: Transition Metal
Group: 11, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s¹
Properties:
Excellent conductor of electricity
Used in jewelry, coins, and electronics
---
Cadmium (Cd) *
Atomic Number: 48
Atomic Mass: 112.41 u
Category: Transition Metal
Group: 12, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s²
Properties:
Toxic metal
Used in batteries and pigments
---
Indium (In) *
Atomic Number: 49
Atomic Mass: 114.82 u
Category: Post-transition Metal
Group: 13, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p¹
Properties:
Soft metal
Used in touch screens and semiconductors
---
Tin (Sn) *
Atomic Number: 50
Atomic Mass: 118.71 u
Category: Post-transition Metal
Group: 14, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p²
Properties:
Resistant to corrosion
Used in soldering and plating
---
Antimony (Sb) *
Atomic Number: 51
Atomic Mass: 121.76 u
Category: Metalloid
Group: 15, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p³
Properties:
Brittle, silvery-white metal
Used in flame retardants and alloys
---
Tellurium (Te) *
Atomic Number: 52
Atomic Mass: 127.60 u
Category: Metalloid
Group: 16, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p⁴
Properties:
Brittle, silvery-white
Used in solar panels and metallurgy
---
Iodine (I) *
Atomic Number: 53
Atomic Mass: 126.90 u
Category: Halogen
Group: 17, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p⁵
Properties:
Dark purple solid
Used in antiseptics and photography
---
Xenon (Xe) *
Atomic Number: 54
Atomic Mass: 131.29 u
Category: Noble Gas
Group: 18, Period 5
Electron Configuration: [Kr] 4d¹⁰ 5s² 5p⁶
Properties:
Colorless, dense gas
Used in high-intensity lamps and flash photography
---
Cesium (Cs) *
Atomic Number: 55
Atomic Mass: 132.91 u
Category: Alkali Metal
Group: 1, Period 6
Electron Configuration: [Xe] 6s¹
Properties:
Soft, gold-colored metal
Highly reactive, used in atomic clocks
---
Barium (Ba) *
Atomic Number: 56
Atomic Mass: 137.33 u
Category: Alkaline Earth Metal
Group: 2, Period 6
Electron Configuration: [Xe] 6s²
Properties:
Soft, silvery-white metal
Used in fireworks and medical imaging
---
Lanthanum (La) *
Atomic Number: 57
Atomic Mass: 138.904 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 5d¹ 6s²
Properties:
Soft, silvery-white metal
Used in camera lenses and batteries
---
Cerium (Ce) *
Atomic Number: 58
Atomic Mass: 140.116 u
Category: Lanthanide
Group: 4, Period 6
Electron Configuration: [Xe] 4f¹ 5d¹ 6s²
Properties:
Used in catalysts and glass polishing
---
Praseodymium (Pr) *
Atomic Number: 59
Atomic Mass: 140.907 u
Category: Lanthanide
Group: 5, Period 6
Electron Configuration: [Xe] 4f³ 6s²
Properties:
Used in magnets and as a colorant in glass
---
Neodymium (Nd) *
Atomic Number: 60
Atomic Mass: 144.242 u
Category: Lanthanide
Group: 6, Period 6
Electron Configuration: [Xe] 4f⁴ 6s²
Properties:
Used in strong magnets and lasers
---
Promethium (Pm) *
Atomic Number: 61
Atomic Mass: 145 u (radioactive)
Category: Lanthanide
Group: 7, Period 6
Electron Configuration: [Xe] 4f⁵ 6s²
Properties:
Radioactive
Used in atomic batteries
---
Samarium (Sm) *
Atomic Number: 62
Atomic Mass: 150.36 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f⁶ 6s²
Properties:
Used in magnets and nuclear reactors
---
Europium (Eu) *
Atomic Number: 63
Atomic Mass: 151.964 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f⁷ 6s²
Properties:
Used in phosphorescent materials and televisions
---
Gadolinium (Gd) *
Atomic Number: 64
Atomic Mass: 157.25 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f⁷ 5d¹ 6s²
Properties:
Used in MRI contrast agents and neutron capture
---
Terbium (Tb) *
Atomic Number: 65
Atomic Mass: 158.925 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f⁸ 6s²
Properties:
Used in solid-state devices and green phosphors
---
Dysprosium (Dy) *
Atomic Number: 66
Atomic Mass: 162.500 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f⁹ 6s²
Properties:
Used in magnets and nuclear reactors
---
Holmium (Ho) *
Atomic Number: 67
Atomic Mass: 164.930 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f¹⁰ 6s²
Properties:
Used in lasers and nuclear reactors
---
Erbium (Er) *
Atomic Number: 68
Atomic Mass: 167.259 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f¹¹ 6s²
Properties:
Used in fiber optics and pink glass
---
Thulium (Tm) *
Atomic Number: 69
Atomic Mass: 168.934 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f¹² 6s²
Properties:
Used in medical lasers and nuclear reactors
---
Ytterbium (Yb) *
Atomic Number: 70
Atomic Mass: 173.04 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f¹³ 6s²
Properties:
Used in fiber optics and as a doping agent
---
Lutetium (Lu) *
Atomic Number: 71
Atomic Mass: 174.9668 u
Category: Lanthanide
Group: 3, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹ 6s²
Properties:
Used in catalysts and medical imaging
---
Hafnium (Hf) *
Atomic Number: 72
Atomic Mass: 178.49 u
Category: Transition Metal
Group: 4, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d² 6s²
Properties:
High melting point
Used in nuclear reactors and as a control rod material
---
Tantalum (Ta) *
Atomic Number: 73
Atomic Mass: 180.947 u
Category: Transition Metal
Group: 5, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d³ 6s²
Properties:
Corrosion-resistant
Used in electronics and surgical implants
---
Tungsten (W) *
Atomic Number: 74
Atomic Mass: 183.84 u
Category: Transition Metal
Group: 6, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d⁴ 6s²
Properties:
Very high melting point
Used in lightbulbs and cutting tools
---
Rhenium (Re) *
Atomic Number: 75
Atomic Mass: 186.207 u
Category: Transition Metal
Group: 7, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d⁵ 6s²
Properties:
High melting point
Used in superalloys and catalysts
---
Osmium (Os) *
Atomic Number: 76
Atomic Mass: 190.23 u
Category: Transition Metal
Group: 8, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d⁶ 6s²
Properties:
Densest naturally occurring element
Used in fountain pen nibs and electrical contacts
---
Iridium (Ir) *
Atomic Number: 77
Atomic Mass: 192.217 u
Category: Transition Metal
Group: 9, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d⁷ 6s²
Properties:
Highly resistant to corrosion
Used in spark plugs and electrical contacts
---
Platinum (Pt) *
Atomic Number: 78
Atomic Mass: 195.084 u
Category: Transition Metal
Group: 10, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d⁹ 6s¹
Properties:
Valuable precious metal
Used in jewelry and catalytic converters
---
Gold (Au) *
Atomic Number: 79
Atomic Mass: 196.9665 u
Category: Transition Metal
Group: 11, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s¹
Properties:
Highly malleable and ductile
Used in jewelry, electronics, and currency
---
Mercury (Hg) *
Atomic Number: 80
Atomic Mass: 200.592 u
Category: Transition Metal
Group: 12, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s²
Properties:
Liquid at room temperature
Used in thermometers and fluorescent lamps
---
Thallium (Tl) *
Atomic Number: 81
Atomic Mass: 204.38 u
Category: Post-transition Metal
Group: 13, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹
Properties:
Soft metal
Used in electronics and rodent poisons
---
Lead (Pb) *
Atomic Number: 82
Atomic Mass: 207.2 u
Category: Post-transition Metal
Group: 14, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²
Properties:
Dense, malleable metal
Used in batteries and radiation shielding
---
Bismuth (Bi) *
Atomic Number: 83
Atomic Mass: 208.9804 u
Category: Post-transition Metal
Group: 15, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
Properties:
Low toxicity compared to other heavy metals
Used in pharmaceuticals and cosmetics
---
Polonium (Po) *
Atomic Number: 84
Atomic Mass: 209 u (radioactive)
Category: Metalloid
Group: 16, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Properties:
Radioactive
Used in atomic batteries and neutron sources
---
Astatine (At) *
Atomic Number: 85
Atomic Mass: 210 u (radioactive)
Category: Halogen
Group: 17, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵
Properties:
Extremely rare and radioactive
Potential use in targeted alpha-particle therapy
---
Radon (Rn) *
Atomic Number: 86
Atomic Mass: 222 u (radioactive)
Category: Noble Gas
Group: 18, Period 6
Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
Properties:
Colorless, odorless gas
Used in cancer treatment
---
Francium (Fr) *
Atomic Number: 87
Atomic Mass: 223 u (radioactive)
Category: Alkali Metal
Group: 1, Period 7
Electron Configuration: [Rn] 7s¹
Properties:
Highly radioactive
Very unstable and rare
---
Radium (Ra) *
Atomic Number: 88
Atomic Mass: 226 u (radioactive)
Category: Alkaline Earth Metal
Group: 2, Period 7
Electron Configuration: [Rn] 7s²
Properties:
Emits radon gas
Used in radiation therapy
---
Actinium (Ac) *
Atomic Number: 89
Atomic Mass: 227 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 6d¹ 7s²
Properties:
Radioactive
Used in radiation therapy and neutron sources
---
Thorium (Th) *
Atomic Number: 90
Atomic Mass: 232.038 u
Category: Actinide
Group: 4, Period 7
Electron Configuration: [Rn] 6d² 7s²
Properties:
Radioactive
Potential fuel for nuclear reactors
---
Protactinium (Pa) *
Atomic Number: 91
Atomic Mass: 231.0359 u
Category: Actinide
Group: 5, Period 7
Electron Configuration: [Rn] 6d² 7s²
Properties:
Radioactive
Used in research and nuclear reactors
---
Uranium (U) *
Atomic Number: 92
Atomic Mass: 238.0289 u
Category: Actinide
Group: 6, Period 7
Electron Configuration: [Rn] 6d¹ 7s²
Properties:
Radioactive
Used as fuel in nuclear reactors and for atomic bombs
---
Neptunium (Np) *
Atomic Number: 93
Atomic Mass: 237 u (radioactive)
Category: Actinide
Group: 7, Period 7
Electron Configuration: [Rn] 5f⁴ 6d¹ 7s²
Properties:
Radioactive
Used in research and potential fuel for reactors
---
Plutonium (Pu) *
Atomic Number: 94
Atomic Mass: 244 u (radioactive)
Category: Actinide
Group: 8, Period 7
Electron Configuration: [Rn] 5f⁶ 7s²
Properties:
Radioactive
Used in nuclear reactors and weapons
---
Americium (Am) *
Atomic Number: 95
Atomic Mass: 243 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f⁷ 7s²
Properties:
Used in smoke detectors and research
---
Curium (Cm) *
Atomic Number: 96
Atomic Mass: 247 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f⁷ 6d¹ 7s²
Properties:
Radioactive
Used in space exploration and research
---
Berkelium (Bk) *
Atomic Number: 97
Atomic Mass: 247 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f⁹ 7s²
Properties:
Radioactive
Used in research, particularly in producing other transuranic elements
---
Californium (Cf) *
Atomic Number: 98
Atomic Mass: 251 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹⁰ 7s²
Properties:
Radioactive
Used in neutron sources and cancer treatment
---
Einsteinium (Es) *
Atomic Number: 99
Atomic Mass: 252 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹¹ 7s²
Properties:
Radioactive
Produced in small quantities for research purposes
---
Fermium (Fm) *
Atomic Number: 100
Atomic Mass: 257 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹² 7s²
Properties:
Radioactive
Mostly used for research, particularly in nuclear physics
---
Mendelevium (Md) *
Atomic Number: 101
Atomic Mass: 258 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹³ 7s²
Properties:
Radioactive
Used for scientific research, very limited availability
---
Nobelium (No) *
Atomic Number: 102
Atomic Mass: 259 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹⁴ 7s²
Properties:
Radioactive
Used in research, very short half-life
---
Lawrencium (Lr) *
Atomic Number: 103
Atomic Mass: 262 u (radioactive)
Category: Actinide
Group: 3, Period 7
Electron Configuration: [Rn] 5f¹⁴ 7s² 7p¹
Properties:
Radioactive
Produced in very small amounts for research purposes
---
Rutherfordium (Rf) *
Atomic Number: 104
Atomic Mass: 267 u (radioactive)
Category: Transition Metal
Group: 4, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d² 7s²
Properties:
Radioactive
Synthetic element used in research
---
Dubnium (Db) *
Atomic Number: 105
Atomic Mass: 270 u (radioactive)
Category: Transition Metal
Group: 5, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d³ 7s²
Properties:
Radioactive
Synthetic element used in research
---
Seaborgium (Sg) *
Atomic Number: 106
Atomic Mass: 271 u (radioactive)
Category: Transition Metal
Group: 6, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁴ 7s²
Properties:
Radioactive
Synthetic element, used in research
---
Bohrium(Bh) *
Atomic Number: 107
Atomic Mass: 270 u (radioactive)
Category: Transition Metal
Group: 7, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁵ 7s²
Properties:
Radioactive
Synthetic element, used in scientific studies
---
Hassium (Hs) *
Atomic Number: 108
Atomic Mass: 277 u (radioactive)
Category: Transition Metal
Group: 8, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁶ 7s²
Properties:
Radioactive
Highly unstable and used in research
---
Meitnerium (Mt) *
Atomic Number: 109
Atomic Mass: 278 u (radioactive)
Category: Transition Metal
Group: 9, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁷ 7s²
Properties:
Radioactive
Synthetic element, very short-lived and used in research
---
Darmstadtium (Ds) *
Atomic Number: 110
Atomic Mass: 281 u (radioactive)
Category: Transition Metal
Group: 10, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁸ 7s²
Properties:
Radioactive
Synthetic element, used in scientific studies
---
Roentgenium (Rg) *
Atomic Number: 111
Atomic Mass: 282 u (radioactive)
Category: Transition Metal
Group: 11, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d⁹ 7s²
Properties:
Radioactive
Synthetic element, used in research
---
Copernicium (Cn) *
Atomic Number: 112
Atomic Mass: 285 u (radioactive)
Category: Transition Metal
Group: 12, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s²
Properties:
Radioactive
Unstable and synthetic, used in research
---
Nihonium (Nh) *
Atomic Number: 113
Atomic Mass: 286 u (radioactive)
Category: Post-transition Metal
Group: 13, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹
Properties:
Radioactive
Synthetic element, used in research
---
Flerovium (Fl) *
Atomic Number: 114
Atomic Mass: 289 u (radioactive)
Category: Post-transition Metal
Group: 14, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
Properties:
Radioactive
Synthetic element, used in research
---
Moscovium (Mc) *
Atomic Number: 115
Atomic Mass: 290 u (radioactive)
Category: Post-transition Metal
Group: 15, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³
Properties:
Radioactive
Very unstable and synthetic, used in research
---
Livermorium (Lv) *
Atomic Number: 116
Atomic Mass: 293 u (radioactive)
Category: Post-transition Metal
Group: 16, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
Properties:
Radioactive
Synthetic element, used in research
---
Tennessine (Ts) *
Atomic Number: 117
Atomic Mass: 294 u (radioactive)
Category: Halogen
Group: 17, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
Properties:
Radioactive
Synthetic element, used in research
---
Oganesson (Og) *
Atomic Number: 118
Atomic Mass: 294 u (radioactive)
Category: Noble Gas
Group: 18, Period 7
Electron Configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Properties:
Radioactive
Synthetic, very short-lived
---
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