Question

3. . An element X has 3 electrons in its M shell . i. What is the atomic number of this element? ii. What is the valency of X iii. Write the formula of chloride of the element X iv. Write if X will be oxidizing or reducing agent.

Answer 1

Explanation:

i) atomic no. of the element is 5 ( boron), l shell=2, and m shell=3 ( outermost shell).

ii) Valency of X is 3 (the outermost shell has 3 electrons).

iii) formula of chloride of the element X is Bcl3 ( criss-cross valence method).

iv) X will be reducing agent.