A. 3
B. 4
C. 15
D. 31
Correct Answer:
Option A = 3
Explanation
The element is Phosphorus in group 5 with valencies of 3 and 5.
A. 3
B. 4
C. 15
D. 31
Correct Answer:
Option A = 3
Explanation
The element is Phosphorus in group 5 with valencies of 3 and 5.
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