How do you calculate protons neutrons isotopes for radium?

Answer 1

Atomic number of uranium: 92 (the same for all the isotopes) Atomic number of an element = number of protons = number of electrons Atomic Mass of the isotopes of uranium: 234, 235, 236, 238, 239, 240, ...., etc. Atomoc mass - Atomic number = Number of neutrons

Answer 2

Because the atomic number of radium is 88, radium has 88 protons.

The number of neutrons is different for each isotope:

Number of neutrons = Atomic mass of an isotope - 88

For example radium 226 has 138 neutrons.

Answer 3

Radium has an atomic number of 88, which means it has 88 protons. To calculate the number of neutrons in a radium isotope, subtract the atomic number from the mass number. Isotopes of radium will have different numbers of neutrons, but the number of protons remains constant at 88.

Answer 4

It's atomic mass (the top number next to the chemical abbreviation)- the atomic/proton number (bottom number).