Strontium is most likey to form which ion?

Question

The element strontium is most likely to form which of these ions?

a. Sr+

b. Sr 2+

c. Sr2-

d. Sr 2-

Does this relate this its electronegativity of 1.0? Just reviewing for a final

Answer 1

Sr2+ ... not connected with its electronegativity.

Yes, related to its I.E.  - the third ionisation energy would be too high to allow the loss of more electrons.

Answer 2

It does not relate to either the electronegativity or the first ionization energy directly, but, if you consider both its low electronegativity _and_ the fact that it is in Group 2 (IIA) (and has two valence electrons), you reach the conclusion that it will most likely form the +2 oxidation state.