Question

Potassium’s atomic number is 19 and its atomic mass is 39. How many neurons does potassium have?(1 point)%0D%0AResponses%0D%0A%0D%0A19%0D%0A19%0D%0A%0D%0A20%0D%0A20%0D%0A%0D%0A58%0D%0A58%0D%0A%0D%0A39

Answer 1

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

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

For potassium (K), the atomic number is 19, and the atomic mass is approximately 39.

Calculating the number of neutrons:

\[
\text{Number of Neutrons} = 39 - 19 = 20
\]

So, potassium has **20 neutrons**.