For each of the following four sets of conditions, enter the formula of the simple ionic compound that could form from the elements X and Z. Give the cationic element first and the anionic element second.
e.g. X3Z5 (if X is the cation) -- subscripts are inferred.
(Coefficients of "1" are omitted -- as in NaCl)
X has 4 valence electrons and Z has 2 valence electrons:
1pts
X has 6 valence electrons and Z has 2 valence electrons:
1pts
Tries 0/10
X has 7 valence electrons and Z has 2 valence electrons:
1pts
Tries 0/10
X has 6 valence electrons and Z has 1 valence electron:
1pts
Tries 0/10
I tried reading the text, and I've guessed a few times to no avail=( Help is appreciated!