Enter the number of protons in the element and the number of neutrons in the element into the Element Mass Calculator. The calculator will evaluate and display the Element Mass.

## Element Mass Formula

The following formula is used to calculate the Element Mass.

Me = #N + #P

• Where Me is the Element Mass (amu)
• #P is the number of protons in the element
• #N is the number of neutrons in the element

## How to Calculate Element Mass?

The following example problems outline how to calculate Element Mass.

Example Problem #1:

1. First, determine the number of protons in the element.
• The number of protons in the element is given as: 8.
2. Next, determine the number of neutrons in the element.
• The number of neutrons in the element is provided as: 8.
3. Finally, calculate the Element Mass using the equation above:

Me = #N + #P

The values given above are inserted into the equation below and the solution is calculated:

Me = 8 + 8 = 16 (amu)

Example Problem #2:

For this problem, the variables needed are provided below:

number of protons in the element = 9

number of neutrons in the element = 10

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

Me = #N + #P = ?