Intro to Periodic TablePeterson

Intro to Periodic TableAtom – basic building block of all

matter.

Examples = He

H2O Salt WaterItalian Salad Dressing

Intro to Periodic TableElement – substance that consists

of only one type of atom. Molecule may have one, two or more…

Compound – substance that consists of more than one type of element.

Example = O or Oxygen

Example = O2 or Oxygen

Example = CO2 or Carbon Dioxide

Intro to Periodic TableAtoms

Nucleus – small, heavy part of the atom Electron Cloud – large, light weight part of

the atom

Intro to Periodic TableNucleus –

Neutrons No charge, Mass of 1 AMU Proton + charge, Mass of 1 AMU

# protons = Atomic #Atomic mass = n + p+

Intro to Periodic TableElectron Cloud –

Electrons - charge, ~0 mass Determine bonding properties of

substance!Install Periodic Table K12 App