Question

The atomic number of neon is 10. Therefore, which of the following is correct about an atom of neon?

(A) It has 8 electrons in its outer electron shell.
(B) It is inert.
(C) It has an atomic mass of 10 daltons.
(D) A and B only
(E) A, B, and C are correct.

Answer 1

option D (A and B only) is correct

Step-by-step explanation:

Atomic number of Ne = 10

Electronic configuration of Ne =
`1s^22s^22p^6`

Number of electron in outer shell = 8

Octet of Ne is complete and elements having compete octet is stable and therefore, are chemically inert.

Atomic mass of Ne = 20.1797 u or dalton

So, among given, option D is correct

Answer 2

Answer: Option (D) is the correct answer.

Step-by-step explanation:

Atomic mass is defined as the sum of total number of protons and electrons present in an element.

On the other hand, atomic number means the total number of protons in an element.

For example, atomic mass of neon is 20 whereas atomic number of neon is 10.

Hence, electronic distribution of neon is 2, 8.

An element that has completely filled octet is also known as an inert element.

Thus, we can conclude that statements A and B only correct about an atom of neon.