how to calculate the number of neutrons

To calculate the number of neutrons in an atom, subtract the atomic number from the atomic mass.

1. Look up the atomic number (Z) and atomic mass (A) of the element you are interested in.
2. The atomic number represents the number of protons in the nucleus of an atom. It is typically written as a subscript to the left of the element's symbol.
3. The atomic mass is the average mass of all the isotopes of the element. It is typically written as a superscript to the left of the element's symbol.
4. Subtract the atomic number (Z) from the atomic mass (A). The result will give you the number of neutrons (N).

Mathematically, N = A - Z

For example, let's calculate the number of neutrons in carbon (C):

• The atomic number of carbon is 6 (Z = 6).
• The atomic mass of carbon is 12.01 (A = 12.01).
• Subtracting the atomic number from the atomic mass: N = A - Z = 12.01 - 6 = 6.01.
• Therefore, carbon has 6 neutrons