What do elements in the first two columns of the periodic table have in common? a.) they have two valence electrons b.) they tend to lose electrons to gain stability c.) they react strongly with the alkali

What do elements in the first two columns of the periodic table have in common?

a.) they have two valence electrons

b.) they tend to lose electrons to gain stability

c.) they react strongly with the alkali metals

d.) they do not react with halogens

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