# Protons Neutrons & Electrons for All Elements

In the below table we list the number of protons, neutrons and electrons for each element in the periodic table.

## How to find the Atomic Number

The atomic number of an element is the number of protons in its nucleus. The most reliable method to determine the atomic number is to consult a periodic table; it’s in the upper left corner or has the highest value on the square.

## Finding the Number of Protons

The atomic number of an element is equal to the number of protons in its atom. Using oxygen as our example, we can see that it has an atomic number of eight on the periodic table. This means that there are eight protons inside every atom of oxygen. Also, keep in mind that the number of protons cannot be altered for any element.

## Finding the Number of Neutrons

The atomic number minus the atomic mass yields the number of neutrons in an atom. Both of these quantities may be found on the periodic table. The atomic number is shown above the element’s symbol, whereas the mass number is located below it. Let us continue to use oxygen as an example. Its atomic weight is 15.999 amu, and its atomic number is 8. When we subtract 8 from 15.999, we get 8.

It is important to know that the number of neutrons for each element can be different. This is because some elements have isotopes, which contain various numbers of neutrons in their atoms.

## Finding the Number of Electrons

The atomic number of an element is the sum of its electrons, which is equal to the atom’s neutral charge. neutrally charged species The number of electrons and protons in an element are equal, so the amount of electrons in oxygen is also 8. Furthermore, because these two subatomic particles, electrons and protons, have opposite charges, they cancel each other out and maintain the atom neutral.

## Summary

Number of Protons = Atomic Number

Number of Electrons = Atomic Number

Number of Neutrons = Atomic Mass – Atomic Number