The most common oxidation state of an element is -2. The number of electrons present in its outermost shell is:

(a) 2

(b) 4

(c) 6

(d) 8

Concept Videos :-

#2 | Oxidising & Reducing Agent
#6 | Balancing of Equation by suing n Factor

Concept Questions :-

Oxidation & Reducing Agents (Oxidation No)
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