Unit 1: Atomic Structure and Properties

A chemist's counting unit representing 6.022 x 10^23 of anything, also known as ______ number.

The mass of one mole of a substance, expressed in units of ______ per mole (g/mol).

An analytical technique used to determine the exact masses and relative ______ of different isotopes of an element.

The ______ whole-number ratio of atoms in a compound.

The ______ number of atoms of each element in a molecule, which is a whole-number multiple of the empirical formula.