The atomic number of cobalt is 27. The EAN of cobalt in Na₃[Co(NO₂)₄Cl₂] is

Options

(a) 35
(b) 24
(c) 36
(d) 34

Correct Answer:

36

Explanation:

EAN of Co in [Co(NO₂)₄Cl₂]³⁻ is EAN = (27 + 4 * 1 +2 * 1) + 3 = 36.