A full octet makes the noble gases nonreactive.
The correct answer is: Atoms are often more stable when bonded to other atoms
Helium has the highest first ionization energy and francium has the lowest first ionization energy.
Barium(Ba)
Excepting groups 5-12 of the periodic table.the atomic radius increase down in the group.
magnesium (Mg)
question: which of the following elements is the smallest?
answer: chlorine (CI)
The lone pair repels the electrons of the adjacent bonds more so than does a bonding pair of electrons, so thus alters the molecular geometry of the molecule.
For example this is a salt.