Question

which of the following symbols represents a neutron?
-1^0e option 1
2^4he option 2
γ option 3
0^1n option 4

Explanation:

A neutron has a mass number of 1 and an atomic number of 0. The symbol for a neutron is $_{0}^{1}n$. Option 1 represents a beta - particle ($_{ - 1}^{0}e$), Option 2 represents a helium - 4 nucleus ($_{2}^{4}He$) also known as an alpha - particle, and Option 3 represents a gamma ray ($\gamma$) which is a form of electromagnetic radiation with no mass or charge.

Answer:

D. $_{0}^{1}n$