"Building block" of all matter that surround us.
Atom
Substance that is made of just one kind of atom.
Element
The chemical symbol for .................. is O.
Oxygen
The chemical symbol for .................. is He.
Helium
The chemical symbol for .................. is Na.
Sodium
The chemical symbol for .................. is Cl.
Chlorine
The chemical symbol for .................. is C.
Carbon
Most common element found in the Earth's crust.
Oxygen
Most common metal found in the Earth's crust.
Aluminium
Element or Compound?
Compound
Element or Compound?
Element
Most common element found in the Universe.
Hydrogen
Element with the smallest mass in the Periodic Table.
Hydrogen
Substance that are made up more than one kind of atom.
Compound
Chemical term for two atoms joining tightly together.
Bonding
Element or Compound?
Compound
