88
The Atomic Mass is 226 (for the isotope 226Ra), and the number of protons is 88. Subtract the atomic mass from the number of protons.
226-88= 138 neutrons.
As a general rule, for all the isotopes of all chemical elements:
Number of neutrons = Atomic mass - Number of protons (Atomic number)
Radium has 88 protons.
Number of neutrons = Atomic mass of an isotope - 88
For example, the best known isotope of radium, 226Ra, has 138 neutrons.
Number of neutrons = Atomic mass of an isotope - 88
For the isotope 226Ra the number of neutrons is 138.
The isotope of radioactive radium with the longest half-life is radium-226. Radium-226 has a mass number of 226 with 88 protons and 138 neutrons.
Radium has 88 protons and 88 electrons.
Number of neutrons = Atomic mass of an isotope - 88
For example, the best known isotope of radium, 226Ra, has 138 neutrons.
Radium has 88 protons and 138 neutrons.
Radium has 88 protons.
Radium 226 has 88 protons, 88 neutrons, and 138 electrons.
Radon has 86 protons, 86 electrons.Rn-222 isotope has 136 (222 - 86 = 136) neutrons
There are 88 protons/electrons in radium. There are 138 neutrons.
Radium 226 has 88 protons, 88 neutrons, and 138 electrons.
All isotopes of radium have the same number of protons; the number of neutrons is different.
Radon has 86 protons, 86 electrons.Rn-222 isotope has 136 (222 - 86 = 136) neutrons
There are 88 protons/electrons in radium. There are 138 neutrons.
The number of protons of an atom is given by its atomic number. Checking the periodic table, we see that the atom with 88 protons is radium. The isotope of radium with 138 neutrons would thus be 226Ra.
Radium has 88 protons.
Stronium with 31 Protons and 37 Neutrons
This is the isotope radium-226.
Ra-228