Question

Elements X, Y, Z have atomic numbers 11, 16, and 10, respectively. Which one has zero, one, and two valency?

A) Y, Z, X
B) Z, X, Y
C) Y, X, Z
D) Z, Y, X

Answer 1

The valency of element X is 1, element Y is 2, and element Z is 0.

Step-by-step explanation:

The valency of an element is the number of chemical bonds it can form. For element X with atomic number 11, the valency would be 1 because it can form one chemical bond.

For element Y with atomic number 16, the valency would be 2 because it can form two chemical bonds.

And for element Z with atomic number 10, the valency would be 0 because it does not readily form chemical bonds.

Therefore, the correct order of elements with zero, one, and two valency is D) Z, Y, X.