# How do you find the atomic number and mass number of protons neutrons and electrons?

## How do you find the atomic number and mass number of protons neutrons and electrons?

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

## Is atomic number the number of protons and neutrons?

The number of protons determines an element’s atomic number and is used to distinguish one element from another. The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess.

## Why are there 9 protons and 10 electrons in an atom?

There are 9 protons because the atomic number is always equal to the number of protons present. There are 10 neutrons because the number of neutrons is always obtained by subtracting the atomic number from the mass number. There are 9 electrons because the number of protons and the number of electrons are always the same in an atom. 1.

## How is the mass number related to the atomic number?

The top number equals the number of protons plus the number of neutrons. This is called the mass number. So on the first one, the mass number is 12 indicating that the total number of protons and neutrons is 12. Below that is the number six, which is just the number of protons.

## How to calculate the number of neutrons in an atom?

Calculating Number of Neutrons: If we know the number of protons and the mass number of an element, we can also calculate the number of neutrons simply by subtracting its atomic number from its mass number. An atom has an atomic number of 9 and a mass number of 19.

## Is the mass of a neutron the same as a proton?

The next particle inside the atom is called the neutron. Just like protons, neutrons are also located inside the nucleus of the atom. Neutrons also have a mass of about one amu. So protons and neutrons are both located inside the nucleus and they both have a mass of about one amu. Unlike protons, however, neutrons do not carry an electrical charge.