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

Bromine has 35 protons, 45 neutrons and 35 electrons.

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

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

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

Let’s dive right into it!

Finding the Protons, Neutrons and Electrons in Bromine

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 bromine.

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

#1 Number of Protons in Bromine

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 Bromine (Br).

So from the above periodic table, you can see that the atomic number of bromine is 35.

As the atomic number of bromine is 35, it has a total of 35 protons in its nucleus.

Thus, the number of protons in Bromine is 35.

#2 Number of Neutrons in Bromine

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

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

The atomic mass of bromine is 79.904 u (which you can round it to 80). ^[2]

So from this atomic mass (i.e 80), you have to subtract its atomic number (i.e 35).

So you will get 80 – 35 = 45.

Thus, the number of neutrons in Bromine is 45.

#3 Number of Electrons in Bromine

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

Here, the bromine atom is a neutral atom.

So the number of electrons in bromine 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 bromine is 35.

Thus, the number of electrons in Bromine is 35.

Summary

Number of Protons in Bromine

• The number of protons can be found by knowing the atomic number of that atom.
• Number of Protons in Bromine = Atomic number of Bromine = 35

Number of Neutrons in Bromine

• The number of neutrons can be found by subtracting the atomic number from its atomic mass.
• Number of Neutrons in Bromine = Atomic mass of Bromine – Atomic number of Bromine = 80 – 35 = 45

Number of Electrons in Bromine

• For a neutral atom, the number of electrons can be found by knowing the atomic number of that atom.
• Number of Electrons in Bromine = Atomic number of Bromine = 35

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

Check out related topics for more practice;
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