n=1 n=2 n=3

Mg (Z=12) Radii Ne=0.69 Å Na=1.54 Å Mg=1.30 Å

Atomic Radii

Grey = Neutral Radii, Red = Cationic Radii, Blue = Anionic Radii

Isoelectronic Series Radii O 2- = 1.40 Å F - = 1.33 Å Na + = 0.97 Å Mg 2+ = 0.66 Å Isoelectronic atoms/ions have identical numbers of electrons. As the nuclear charge in an isoelectronic series increases the size of the atom decreases.

Periodic Trends in 1 st Ionization Energy

C P Se I Non-metals, high 1 st IE S As Si Ga Zn

Beyond 1 st Ionization Energy

Electron Affinity

Properties of the Group I & II Metals