Question

How many electrons are in neon-20?

a
9
b
10
c
12
d
20

Answer 1

Neon-20 is an isotope of neon, which is a noble gas with the atomic number 10. The atomic number indicates the number of protons in an atom, and since neutral atoms have the same number of electrons as protons, neon-20 also has 10 electrons.

So the answer is:

**b) 10**