Chemistry, 05.03.2021 21:30 4presidents

Which of these is one similarity of the elements in the first group of the periodic table? A.
The elements in the group have similar atomic masses.
B.
The elements in the group have the same number of electrons.
C.
The elements in the group are very unreactive metals.
D.
The elements in the group react with oxygen in similar ways.

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Which of these is one similarity of the elements in the first group of the periodic table? A.