The element radium has a mass number of 226 and an atomic number of 88. How many neutrons does an atom of radium have?
314
226
138
88
To find the number of neutrons, subtract the atomic number (number of protons) from the mass number. In this case, 226 - 88 = 138 neutrons. Therefore, an atom of radium has 138 neutrons.
To determine the number of neutrons in an atom, you need to subtract the atomic number from the mass number.
For radium, the mass number is 226 and the atomic number is 88.
Neutrons = Mass number - Atomic number
Neutrons = 226 - 88 = 138
Therefore, an atom of radium has 138 neutrons.
To determine the number of neutrons in an atom of radium, you can subtract the atomic number (which represents the number of protons) from the mass number.
In this case, the atomic number of radium is 88 and the mass number is 226.
To find the number of neutrons, you subtract the atomic number from the mass number:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 226 - 88 = 138
Therefore, an atom of radium has 138 neutrons.