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

226
226

88
88

314

Answer 1

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

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

For radium:

• Mass number = 226
• Atomic number = 88

Now, plug in the values:

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

So, an atom of radium has 138 neutrons.