Answer: 40%
Explanation:
I got this right on a quiz
I listened to the other guy and it was wrong
I should have gone with my gut
Myosin i think not sure
Answer:
Pitch
The mass number is the sum of the number of protons and number of neutrons the atom has.
So, we can write the equation as:
x + 20 = 40
x = 20 neutrons.