Answer
a) $Al^{3+}$
b) $Li^{+}$
c) $Ba^{2+}$
d) $K^{+}$
e) $Ca^{2+}$
f) $Sr^{2+}$
Work Step by Step
a) $Al^{3+}$
b) $Li^{+}$
c) $Ba^{2+}$
d) $K^{+}$
e) $Ca^{2+}$
f) $Sr^{2+}$
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