Atoms

Basic building block of all matter

• element

• atom

• proton

• nucleus

Positively charged particle in an atom

• nucleus

• proton

• electron

• neutron

Negatively charged particle in an atom

• neutron

• electron

• proton

• ion

Neutral particle present in an atom

• nucleus

• electron

• neutron

• proton

Smallest unit of an element that has properties of that element

• proton

• atom

• element

• pure substance

a substance that cannot be broken down into simpler substances by physical means

• atom

• elements

• pure substance

• mixture

Pure substance made up of two or more different substances

• element

• pure substance

• compound

• molecule

a group of two or more atoms held together chemically

• molecule

• atom

• element

• compound

substance combined in a physical way

• pure substance

• atom

• mixture

• element

type of mixture that is distributed evenly throughout

• heterogenous

• pure substance

• homogenous

• ion