5th-Sc-Ch12-Rev

materials composed of a single type of atom

• reactive

• element

• endothermic reaction

• subatomic particle

substance before it takes part in a chemical reaction

• reactive

• element

• endothermic reaction

• subatomic particle

type of reaction that absorbs heat

• reactive

• element

• endothermic reaction

• subatomic particle

particles that constitute an atom

• reactive

• element

• endothermic reaction

• subatomic particle

everything that has mass and occupies space

• complex molecule

• atomic number

• physical properties

• matter

properties of matter perceived without changing the composition of the material studied

• complex molecule

• atomic number

• physical properties

• matter

molecule composed of more than two atoms

• complex molecule

• atomic number

• physical properties

• matter

number of protons in an atom

• complex molecule

• atomic number

• physical properties

• matter

final substance after a chemical reaction

• exothermic reaction

• product

• atomic mass

• periodic table

organizes the elements according to their atomic number and mass

• exothermic reaction

• product

• atomic mass

• periodic table