1.

The atomic number of cobalt is 27 . The EAN of cobalt in Na_(3)[Co(NO_(2))_(4) Cl_(2)] is

Answer»

35
24
36
34

Solution :EAN of Co in `[Co (NO_(2))_(4) Cl_2]^(3-)` is EAN = `(27 + 4 XX 1 + 2 xx 1) + 3 = 36`


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