The element radium has a mass number of 226 and an atomic number of 88. How many neutrons does an atom of radium have?(1 point) Responses 226 226 138 138 314 314 88
The mass number represents the total number of protons and neutrons in an atom. The atomic number represents the number of protons in an atom.
To find the number of neutrons in an atom, you subtract the atomic number from the mass number.
Neutrons = mass number - atomic number
Therefore, for an atom of radium (with a mass number of 226 and an atomic number of 88):
Neutrons = 226 - 88 = 138
So, an atom of radium has 138 neutrons.