# Calcium Protons Neutrons Electrons (And How to Find them?)

Calcium has 20 protons, 20 neutrons and 20 electrons.

But how will you find the number of protons, neutrons and electrons in Calcium (Ca)?

Well, it is very easy to find the protons, neutrons and electrons of calcium atom.

Here I have given a very simple method for finding the protons, neutrons and electrons of calcium atom.

Let’s dive right into it!

## Finding the Protons, Neutrons and Electrons in Calcium

How to find protons?

• The number of protons can be found by knowing the atomic number of that atom. [1]

How to find neutrons?

• The number of neutrons can be found by subtracting the atomic number from its atomic mass.

How to find electrons?

• For a neutral atom, the number of electrons can be found by knowing the atomic number of that atom.

Let’s calculate the number of protons, neutrons and electrons in calcium.

If you don’t want to read, then you can also watch this video.

### #1 Number of Protons in Calcium

If you have a periodic table with you, then most of the answers are in front of you.

You can see the elements, their atomic number and their atomic mass from the periodic table.

Now here our element is Calcium (Ca).

So from the above periodic table, you can see that the atomic number of calcium is 20.

As the atomic number of calcium is 20, it has a total of 20 protons in its nucleus.

Thus, the number of protons in Calcium is 20.

### #2 Number of Neutrons in Calcium

In order to find the number of neutrons of calcium atom, you should know its atomic mass first.

The number of neutrons in calcium can be obtained by subtracting the atomic number from its atomic mass.

The atomic mass of calcium is 40.078 u (which you can round it to 40). [2]

So from this atomic mass (i.e 40), you have to subtract its atomic number (i.e 20).

So you will get 40 – 20 = 20.

Thus, the number of neutrons in Calcium is 20.

### #3 Number of Electrons in Calcium

For a neutral atom, the number of electrons and the number of protons are the same.

Here, the calcium atom is a neutral atom.

So the number of electrons in calcium is equal to its number of protons (which is also equal to its atomic number).

In the beginning, we have found that the number of protons in calcium is 20.

Thus, the number of electrons in Calcium is 20.

## Summary

Number of Protons in Calcium

• The number of protons can be found by knowing the atomic number of that atom.
• Number of Protons in Calcium = Atomic number of Calcium = 20

Number of Neutrons in Calcium

• The number of neutrons can be found by subtracting the atomic number from its atomic mass.
• Number of Neutrons in Calcium = Atomic mass of Calcium – Atomic number of Calcium = 40 – 20 = 20

Number of Electrons in Calcium

• For a neutral atom, the number of electrons can be found by knowing the atomic number of that atom.
• Number of Electrons in Calcium = Atomic number of Calcium = 20

I hope you have understood the simple method for finding the protons, neutrons and electrons of calcium atom.

Check out related topics for more practice;
Strontium protons neutrons electrons
Barium protons neutrons electrons
Francium protons neutrons electrons
Boron protons neutrons electrons
Carbon protons neutrons electrons

Author
##### Jay Rana

Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online learning platform that provides students with easily understandable explanations.