Question

formula for calcium hydroxide is ca( oh ) 3. find the valency of calcium and hydroxyl group?

Answer 1

calcium hydroxide formula is Ca(OH)2.
by criss Cross method .
so calcium valency is 2 and hydroxide valency is 1

Answer 2

here you go,

Ca      Oh

2^+       1^-

Ca(Oh)2

hope it will help you