Question

10. The electronic configuration of three elements X, Y and Z are expressed as under:
X: 2,8; Y: 2,8,7. Z: 2,8,2;

Of the following options, given below, which one of the following is correct?


A. X is a metal and Z a non-metal.

B. Y is a metal and X is a non-metal.

C. Z is a non-metal and Y is a metal.

D. Y is a non-metal and Z is a metal.

which option is correct.​

Answer 1

Answer:

option D is correct

Explanation:

because

X = 2,8 which have a completely filled electron in the outermost shell so it is a noble gas. (Neon)

Y = 2,8,7 which have 7 electrons filled in the outermost shell so, it is easy for it to gain one electron to get balanced. Since it gains electrons therefore it is a non-metal. (chlorine)

Z = 2,8,2 which have 2 electrons filled in the outermost shell so, it is easy for it to give 2 electrons to get balanced. Since it is giving its electron therefore it is a metal. (magnesium)