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Alexandre Ferry ∙
A full octet makes the noble gases nonreactive.
More protons in the nucleus pull the electrons in, making the atomic radius smaller.
From the elements given, argon shows the least reactivity.
Barium(Ba)
Excepting groups 5-12 of the periodic table.the atomic radius increase down in the group.
O2
magnesium (Mg)
question: which of the following elements is the smallest?
answer: chlorine (CI)
A chemical bond holds atoms together