Studied by 1 personWhat is Ionization Energy?
The amount of energy required to remove an electron from an isolated atom or molecule.
Helium has the highest Ionization Energy meaning it is more difficult it is to remove an electron
(2372kJ/mol), though it’s atomic radius is very small. ^>
What is Atomic Radius?
The distance from the nucleus to the shell. Francium has the largest atomic radius meaning it’s shell is the farthest from the nucleus. ^>
What is Electronegativity?
An atom's ability to attract electrons away from other atoms. The higher electronegativity means the more strongly that element attracts the shared electrons.^>
What is Electron Affinity?
The energy released when an atom gains an electron. The higher the electron affinity
an atom more easily accepts electrons. ^>
What are the traits of Alkali Metals?
Most reactive group of metals
Never found a combined element in nature
Soft/Shiny
What are the traits of Alkaline Earth Metals?
2nd most reactive group of metals
Shiny/Silvery white
Found in earth’s crust
What are the traits of Transition Metals?
Largest group
High electron conductivity
Very hard, used for things like jewelry
What are the traits of
Post-Transitions Metals?
Soft/Brittle
Poor conductors of electricity
What are the traits of
Lanthanides?
Known as rare-earth-metals
What are the traits of Actinides?
Highly electropositive
What are the traits of
Metalloids?
Brittle, Hard
Somewhat reactive
Solids at room temperature
What are the traits of
Halogens?
Most reactive nonmetals
Salt-forming
What are the traits of the
Noble Gases?
mostly non reactive
Colorless, orderless
How many elements did
Mendeleev have to start with?
63
Why was Mendeleev’s table stand out from others?
Mendeleev was able to predict multiple elements and their characteristics.
How are Mendeleev’s periodic table organized?
By atomic weight/atomic mass.
When did Mendeleev publish his table?
1869
What are Valence Electrons?
The amount of electrons on the outer shell, can also be predicted based on group of the element.
What are periods on the periodic table?
Rows
What are groups on the periodic table?
Columns
What are ions?
Positive or negative charge an element has depending on the number of electrons and protons. As an example Ca2+ = Carbon with 2 more protons than electrons. Cation ions are positive ions and Anion ions are negative ions.
What does “Luster” mean?
Ability to reflect light.
What does “Conductivity” mean?
An element ability to transmit or pass along heat/electricity.
What does “Malleability” mean?
Ability to bend before breaking.
What does “Ductility” mean?
Ability to pull into wire.
How do you find the Atomic mass of an element?
Protons + Neutrons
What are the 3 types of elements?
Metals
Metalloids
Non-Metals
Are the noble gases stable?
YES, very.
What is the greatest number of valence electrons an atom can have?
8 valence electrons.
What do the periods mean?
The number of orbitals for the elements in that row
What is a Nuclear fission?
When an atom is split in 2.
The modern Periodic Table of Elements is now organized by...
Atomic number.
What is a Isotope?
An atom that differs in the number of neutrons, but has the same number of protons.
What is the most useful property of the metalloids?
It’s semiconducting behavior.
Note 
Flashcard (28)