# Tin Valence Electrons (And How to Find them?)

So you have seen the above image by now, right?

Awesome! You can see that tin has 4 valence electrons.

But how can you say that Tin has 4 valence electrons
+
How can you find these valence electrons?

Let’s discuss this in short.

Tin has 4 valence electrons because there are 4 electrons present in the outermost shell of the Tin (Sn) atom.

Now let’s see how you can easily find the valence electrons of Tin atom (Sn).

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

## How to find the Valence Electrons? (2 Methods)

In order to find the valence electrons of Tin atom (Sn), you can use two methods.

### Method 1: From the Periodic Table

To find out the valence electrons of Tin, you have to see the position of tin in the periodic table.

More specifically, you have to see the group wise position of Tin element in the periodic table.

From the above image, you can see that the Tin (Sn) is present in the group 14 of periodic table.
(Note: Group 14 is also called group 4A).

So, as the tin element is present in group 14, it has 4 valence electrons.

In this way, by knowing the position of tin element in periodic table, you can easily find its valence electrons.

Now let’s see another method for finding the number of valence electrons in tin.

### Method 2: From the Electron Configuration

If you want to find the valence electrons of tin from its electron configuration, then you should know its electron configuration first.

Now there are many methods to write the electron configurations, but here I will show you the easiest method, i.e by using Aufbau principle.

Aufbau principle: The Aufbau principle simply states that the orbitals with the lower energy are filled first and then the orbitals with higher energy levels are filled.

According to the Aufbau principle, the orbitals are filled in the following order:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, and so on.

Also the maximum number of electrons that can be accommodated in s, p, d & f orbitals are mentioned in the below table.

Now let’s try to find the electron configuration of Tin by using the Aufbau principle.

Electron Configuration of Tin:

Follow the steps mentioned below to get the electron configuration of Tin.

• To write the electron configuration of tin, we should first know the total number of electrons present in a tin atom.
• The tin atom has a total of 50 electrons because its atomic number is 50 and it is a neutral atom[2]
• Now we have to fill these 50 electrons in the atomic orbitals according to the Aufbau principle.
• According to the Aufbau principle, the electrons will be filled first in 1s orbital, then in 2s orbital, then in 2p orbital, and so on…
• So from the Aufbau principle, we can get the electron configuration of the tin atom as 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p2. [3]

Now in this electron configuration of tin, we have to see the total number of electrons present in the highest energy level.

You can see in the electron configuration of tin (1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p2) that the highest energy level is 5. And the total number of electrons present in this energy level is 2 + 2 = 4.

So by knowing the electron configuration, we have found that the Tin has 4 valence electrons.

I hope you have understood the methods of finding the valence electrons in tin.

See more related topics for your practice;
Antimony Valence Electrons
Tellurium Valence Electrons
Iodine Valence Electrons
Thallium Valence Electrons