Atom

Basic unit of matter

Nucleus

The center of the atom

Electron

A negatively charged particle

Element

Pure substance that consists entirely of one type of atom

Isotopes

atoms of the same element that differ in the number of neutrons

compound

a substance formed by the chemical combination of two or more elements

ionic bond

when one or more electrons are transferred from one atom to another

ions

positively and negatively charged atoms

covalent bond

sharing electrons

molecule

smallest unit of most compounds

Van der waals forces

the attraction of inter molecular forces between molecules

Hydrogen bond

atom with partial negative charge

cohesion

a attraction between molecules of the same substance

adhesion

a attraction between molecules of different substances

mixture

a material composed of two or more elements

solution

forming a type of mixture

solute

substance that is dissolved

solvent

the substance in which the solute dissolves

suspensions

such mixtures of water and non dissolved material

pH scale

to indicate the concentration of H+ ions in a solution