General Chemistry
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Identify the elements I, II, III, and IV in the periodic table below. Propose a formula for simplest hydride of each element identified.
KH, CaH2, H2Se, HCl
RbH, SrH2, H2S, HF
RbH2, SrH3, H4S, HF2
KH2, CaH3, H4Se, HCl2