How can you determine the number of neutrons in an isotope?

Answer 1

One doesn't generally "calculate" the number of neutrons. The number of neutrons in an atom is always equal to the number of protons, and the number of protons can be found on the Periodic Table of Elements, which can easily be found on the internet or in a science textbook.

Answer 2

The mass number of the given atom is equivalent to the sum of the numbers of protons and neutrons. The atomic number of an atom equals to the number of protons in that atom. Therefore, the number of neutrons of an atom can be found by subtracting the atomic number from the mass number.

Answer 3

Subtract the atomic number from the mass number. The result will be the number of neutrons.

Answer 4

You subtract the atomic number from the Atomic Mass.

Answer 5

A proton has possitive charge of electron.That is 1.602*10^-19.Multiply this by number of protons.

Answer 6

Number of neutrons = Atomic mass of an isotope - Atomic number of the element

Plutonium atomic number is 94.

Answer 7

Number of protons = Number of electrons = Atomic number

Number of neutrons = Mass number - Number of protons

Answer 8

Atomic number and mass number will help you. You can find number of electrons and protons by atomic number.