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.

I am completely lost on this one...?

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.

I am completely lost on this one...?

anonymous · Answer

A 2+ ion would have to be a metal. Metals give away electrons and form positive ions. +1 through +3 would correspond with the group numbers 1 through 3. +2 would be group 2. What is another name for group 2 elements?

anonymous · Answer

alkaline, right?

anonymous · Answer

Alkaline earth metals

anonymous · Answer

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

anonymous · Answer

I would agree with you.

anonymous · Answer

thank you. chemistry and i just don't get along.

anonymous · Answer

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