Barium Protons Neutrons Electrons (And How to Find them?)

Barium has 56 protons, 81 neutrons and 56 electrons.

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

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

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

Let’s dive right into it!

Finding the Protons, Neutrons and Electrons in Barium

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 barium.

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

#1 Number of Protons in Barium

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 Barium (Ba).

So from the above periodic table, you can see that the atomic number of barium is 56.

As the atomic number of barium is 56, it has a total of 56 protons in its nucleus.

Thus, the number of protons in Barium is 56.

#2 Number of Neutrons in Barium

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

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

The atomic mass of barium is 137.33 u (which you can round it to 137). ^[2]

So from this atomic mass (i.e 137), you have to subtract its atomic number (i.e 56).

So you will get 137 – 56 = 81.

Thus, the number of neutrons in Barium is 81.

#3 Number of Electrons in Barium

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

Here, the barium atom is a neutral atom.

So the number of electrons in barium 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 barium is 56.

Thus, the number of electrons in Barium is 56.

Summary

Number of Protons in Barium

• The number of protons can be found by knowing the atomic number of that atom.
• Number of Protons in Barium = Atomic number of Barium = 56

Number of Neutrons in Barium

• The number of neutrons can be found by subtracting the atomic number from its atomic mass.
• Number of Neutrons in Barium = Atomic mass of Barium – Atomic number of Barium = 137 – 56 = 81

Number of Electrons in Barium

• For a neutral atom, the number of electrons can be found by knowing the atomic number of that atom.
• Number of Electrons in Barium = Atomic number of Barium = 56

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

Check out related topics for more practice;
Francium protons neutrons electrons
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Oxygen protons neutrons electrons