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

A forms a 2+ ion, B is an alkaline earth metal.

A is a noble gas, B forms a 1- ion.

A has 3 valence electrons, B is a halogen.

A forms a 2- ion, B has the atomic number 12.

Question

Which of the following pairs of elements could possibly be found in the same group on the periodic table?

A forms a 2+ ion, B is an alkaline earth metal.

A is a noble gas, B forms a 1- ion.

A has 3 valence electrons, B is a halogen.

A forms a 2- ion, B has the atomic number 12.

anonymous · Answer

A forms a 2+ ion, B is an alkaline earth metal.

juanpablojr · Answer

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