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