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
138
138
314
314
226
226
88
138
To determine the number of neutrons in an atom of radium, you can subtract the atomic number (88) from the mass number (226).
Number of neutrons = Mass number - Atomic number
Number of neutrons = 226 - 88
Number of neutrons = 138
Therefore, an atom of radium has 138 neutrons.
To find the number of neutrons in an atom of radium, you need to subtract the atomic number from the mass number.
The atomic number (Z) represents the number of protons in the nucleus, and in this case, it is 88.
The mass number (A) represents the total number of protons and neutrons in the nucleus, and in this case, it is 226.
To find the number of neutrons, subtract the atomic number from the mass number:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 226 - 88
Number of neutrons = 138
Therefore, an atom of radium has 138 neutrons.