Groups of Elements
Group 1A
- lithium (Li), sodium (Na), potassium (K), rubidium(Rb), cesium (Cs), Francium (Fr)
Group 2A
- beryllium (Be), magnesium (Mg), calcium (Ca), barium (Ba), strontium (Sr), radium (Ra)
Group 7A
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At)
Noble or inert gases
- helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn)