# What is the term used to describe the number of protons plus the number of neutrons in an atom?

What is the term used to describe the number of protons plus the number of neutrons in an atom?

## This Post Has 10 Comments

1. turboslayer says:

The mass number

Explanation:

neutrons + protons = mass number

2. megamorph says:

It equals the atomic mass.

3. bravomichelle75 says:

B. Atomic Mass

Explanation:

4. allegra0103 says:

Atomic mass

protons are the atomic number
protons plus neutrons are the atomic mass

5. thebasedgodchri says:

The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.

Explanation:

6. chaaaa says:

The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.

7. mttttttthhhhhhh551 says:

The Atomic number

Explanation:

8. ShianHagen5 says:

The mass of Carbon-12 is 12.

9. rebecca7415 says:

The number of protons plus the number of neutrons equals the atomic mass.

Explanation:

Atomic mass is defined as total number of protons and neutrons in the atom.

It is an average mass of an atom.

It is expressed in atomic mass unit that is a.m.u.

It is denoted with symbol 'A'.

$A =\text{number of protons + number of neutrons}$.

10. 1060975 says:

Atomic Mass (amu), which can sometimes be called Atomic Weight