EXAM 7: MATTERS OF SCALE

A measure of how heavy an isotope or an element is. It is based on the element's weight in relation to the weight of carbon-12 and is expressed without a mass unit.

___________ indicates the mass of a molecule.

___________ of a substance is the sum of the atomic mass of each atom in its chemical formula.

A ______ is a unit used to measure the amount of a substance.

____________ can be calculated from molecular weight and density.

_________ is the number of atoms, molecules, ions, electrons, or other subatomic particles that make up one molecule of a substance.

____________ is the branch of chemistry that allows chemists to determine what quantities of the reactants in a chemical reaction are needed to produce a specific amount of product.