Question:

What is the valency of these elements witj tje following atomic numbers

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atomic numbers are

96

56

43

77

plzz tell me as soon as possible

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  1. 96 http://en.wikipedia.org/wiki/Curium   ....   +3

    56  http://en.wikipedia.org/wiki/Barium   .... +2

    43  http://en.wikipedia.org/wiki/Technetium .... 7, 6, 5 ,4, 3, 1

    77  http://en.wikipedia.org/wiki/Iridium  ,....2,3,4,6

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