Match the elements in column A with the valency exhibited by the element given in column B.

Options

A. `A to b, B to c, C to d, D to e, E to a`
B. `A to b, B to c, C to a, D to e, E to d`
C. `A to e,B to b, C to a, D to b, E to c`
D. `A to e, B to c, C to d, D to b, E to a`

Answer

d

Explanation

A →e Atomic number of neon is 10 and electronic configuration 2, 8, valency = 0.
B→ c Atomic number of oxygen is 8 and elec tronic configuration 2, 6, valency = 8 - 6 = 2.
C→ d Atomic number of potassium is 19 and electronic configuration is 2, 8, 8, valency = 1.
D → b Atomic number of boron is 5 and electronic configuration is 2, 3, valency = 3.
E →a Atomic number of silicon is 14 and elec tronic configuration is 2, 8, 4, valency = 4.