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.

Option (D) is the correct answer.

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.