X, Y and Z elements have 4, 5 and 7 valence electrons . Draw the structure of XH_(4), YH_(5) YH_(3)" and " H - Z.

X, Y and Z elements have 4, 5 and 7 valence electrons . Draw the struc

1.	X, Y and Z elements have 4, 5 and 7 valence electrons . Draw the structure of XH_(4), YH_(5) YH_(3)" and " H - Z.
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