Chemistry

Jabari Bird

31 July, 23:21

Which of the following pairs of elements could possibly be found in the same group on the periodic table?

A is an alkali metal; B forms a 1 - ion.

A has two valence electrons; B forms a 2 - ion.

A is a noble gas; B has seven valence electrons.

A forms a - 3 ion; B has five valence electrons.

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