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Alkali metals are listed in the first column of the periodic table. this tells you that

a they are highly reactive

b they have only one electron in their outer orbital shells.

c their nuclei contain only one neutron

d both a and b​

User Agscala
by
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1 Answer

5 votes

Answer:

B. they have only one electron in their outer orbital shells

User Yves Goeleven
by
7.5k points
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