What is atomic mass? a. The amount of stuff in an atom
b. The average mass of all the isotope added together ( I know this answer is incorrect.)
c. The average mass of all isotopes weighted by percent abundance
d. The average mass of all elements together

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

Answer    "a salt" would be the best answerexplanationsalts can be defined as ionic compounds that are neither acids nor bases. nacl is an example of a salt, and its ionic.an enzyme is an organic compound which is covalently bonded, not ionically bonded.acids are generally held together by covalent bondsan element does not need any bonds to exist

Ive had this before. your answer would be d. hope this ya