How do you find the atomic mass mass number of an atom?

a. add the number of protons and neutrons together

b. subtract the number of protons by the number of neutrons

c. add the number of protons and elections together

d. subtract the number of protons by the number of neurons

To calculate the atomic mass of a single atom, add up the mass of protons and neutrons.

So, your answer would be A) add the number of protons and neutrons

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .