what is the valency of K,Ca,Fe,Co,Cu,Zn,Br,Kr,Ag,Au and Hg
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K--_ +1
Ca--_+2
Fe--_+2,+3
Co--_+2
Cu--_+2
Zn--_+1,+2
Br--_-1
Kr--_0
Ag--_+2,+4
Au--_+1,+3
Hg--_+2,+4
Those element in which i have written two Valencies , those elements posses variable valency
Kr is an inert gas therefore it has 0 valency
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Ca--_+2
Fe--_+2,+3
Co--_+2
Cu--_+2
Zn--_+1,+2
Br--_-1
Kr--_0
Ag--_+2,+4
Au--_+1,+3
Hg--_+2,+4
Those element in which i have written two Valencies , those elements posses variable valency
Kr is an inert gas therefore it has 0 valency
Hope my answer helps u
If u find it useful pls mark it as brainliest
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