Question

An atom of tungsten (W) has 74 protons. The atomic mass of tungsten is 183.84.

How many neutrons does an atom of tungsten have? Round your answer to the nearest whole number.

Answer 1

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

\[
\text{Number of neutrons} = \text{Atomic mass} - \text{Number of protons}
\]

In this case, the atomic mass of tungsten (W) is approximately 183.84, and the number of protons is 74.

Now, plug the values into the formula:

\[
\text{Number of neutrons} = 183.84 - 74 = 109.84
\]

Now, rounding this to the nearest whole number gives us:

\[
\text{Number of neutrons} \approx 110
\]

So, an atom of tungsten has approximately **110 neutrons**.