How do you find out how many protons, electrons, and neutrons an atom has?

So the atomic number is the same as protons, and electrons and to get neutrons by subtracting number of protons from atomic mass.

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 .