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)

Question

Responses

138
138

314
314

88
88

226
226

Answer 1

To find the number of neutrons in an atom, you can use the formula:

\[ \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \]

For radium, the mass number is 226 and the atomic number is 88.

\[ \text{Number of neutrons} = 226 - 88 = 138 \]

So, an atom of radium has 138 neutrons.