How Many Neutrons Does A Potassium Atom Have?

How many neutrons does potassium have?

We can calculate how many neutrons potassium has by looking at the following information:

• Atomic mass = number of protons + number of neutrons.
• Atomic number = number of protons.

We know that potassium has an atomic number of 19 and an atomic mass of 39.0983 amu. By plugging in these values, we can therefore deduce that:

• Atomic Number (19) = 19 Protons
• Atomic Number (39.0983) = 19 Protons + Number of Neutrons

• Number of Neutrons = 39.0983 - 19 = 20.0983 ≈ 20

In essence, potassium has 20 neutrons.