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

314
314

226
226

88
88

138

Answer 1

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

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

Given that the mass number of radium is 226 and the atomic number is 88:

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

So, the correct answer is 138.