J.R. S. answered 10/05/18
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Rb -> Rb1+
Sr -> Sr2+
Li -> Li1+
Cs -> Cs1+
Kr -> usually doesn't form an ion, but under extreme conditions will form Kr2+
Sr -> Sr2+
Li -> Li1+
Cs -> Cs1+
Kr -> usually doesn't form an ion, but under extreme conditions will form Kr2+