Answer
a) Ca: +2; C: +4; O: -2
b) Cl: 0
c) Li: +1; I:+5; O:-2
d) Na: +1; S: +4; O: -2
Work Step by Step
a) Ca: +2; C: +4; O: -2
b) Cl: 0
c) Li: +1; I:+5; O:-2
d) Na: +1; S: +4; O: -2
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