Question

1.An atom of silicon has a mass number of 28 and an atomic number of 14. How many protons and how many neutrons are in this atom? Show your calculation.

Answer 1

There are 14 protons

There are 14 neutrons

Step-by-step explanation:

Here, we want to get the number of protons and neutrons in the atom

Firstly, the atomic number is the same as the number of protons in the atom

That means, the atom has 14 protons

Mathematically, the sum of the number of protons and the number of neutrons equal the mass number

Thus:

`\begin{gathered} Number\text{ of neutrons = mass number - atomic number} \\ Number\text{ of neutrons = 28 - 14 = 14} \end{gathered}`