Periodic Table of Elements
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15 Terms
Hydrogen
The first element on the periodic table, symbol H, a colorless gas.
Helium
The second element, symbol He, a light, non-reactive gas used in balloons.
Lithium
A soft, silver-white metal, symbol Li, used in batteries.
Beryllium
A hard, gray metal, symbol Be, used in aerospace materials.
Carbon
Essential element for life, symbol C, forms the basis of organic chemistry.
Oxygen
Essential for respiration, symbol O, a diatomic molecule that supports life.
Gold
A precious metal, symbol Au, known for its value and resistance to corrosion.
Sodium
An alkali metal, symbol Na, reactive with water, used in table salt.
Chlorine
A greenish-yellow gas, symbol Cl, used in disinfectants and bleach.
Argon
A noble gas, symbol Ar, used in lighting and welding.
Iron
A strong metal, symbol Fe, used in construction and manufacturing.
Neon
A noble gas, symbol Ne, produces a bright glow in neon signs.
Krypton
A noble gas, symbol Kr, used in high-performance lighting.
Xenon
A noble gas, symbol Xe, used in flash lamps and as an anesthetic.
Radon
A radioactive noble gas, symbol Rn, a health hazard in homes.
