Bacola 22/23 6.5 Vocab. Atoms Elements Compounds

The basic particle from which all element are made; the smallest particle of an element that has the properties of the element

• Atom

• Molecule

• Element

• Compound

A substance made of two or more elements that are chemically combined

• Atom

• Element

• Compound

• Molecule

A pure substance that cannot be broken down into other substances by chemical or physical means.

• Atom

• Element

• Compound

• Molecule

A neutral group of two or more atoms held together by bonds

• Compound

• Element

• Atom

• Molecule

The center of an atom

• Proton

• Neutron

• Electron

• Nucleus

Small, positively charged particles that are found in the nucleus of an atom

• Proton

• Neutron

• Electron

• Nucleus

A small particle in the nucleus of the atom, with no electrical charge

• Proton

• Neutron

• Electron

• Nucleus

A tiny, negatively charged particle that moves around the outside of the nucleus of an atom. 

• Proton

• Neutron

• Electron

• Nucleus

A reaction that releases energy, usually in the form of heat

• Endothermic Reaction

• Exothermic Reaction

A reaction that absorbs energy

• Endothermic Reaction

• Exothermic Reaction