"Building block" of all matter that surround us.
Atom
How many different types of atoms occur naturally in the Universe?
94
Have many different types of atoms have been made in laboratories?
24
Greek philosopher who suggested that everything was made up of tiny pieces.
Democritus
Substance that is made of just one kind of atom.
Element
Group of atoms joined tightly together.
Molecule
A molecule of oxygen is made from ............. atoms of oxygen joined together.
Two
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
The rows in the Periodic Table are called...
Periods
The columns in the Periodic Table are called..
Groups
When you read each row across the Periodic Table, from left to right, the mass of the atoms ........................
Increase
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
What is the formula for Sodium Chloride?
NaCl
What is the formula for Carbon Dioxide?
CO2
What is the formula for Carbon Monoxide?
CO
Complete the word equation:
Calcium + Carbon + ..................... = Calcium Carbonate
Oxygen
Different elements or compounds that are not joined together chemically.
Mixture
Compound or Mixture?
Mixture
Compound or Mixture?
Mixture
Compound or Mixture?
Mixture
Compound or Mixture?
Compound
Compound or Mixture?
Compound
Compound or Mixture?
Compound
Mixture of Carbon Dioxide, Nitrogen, Oxygen and Water Vapor.
Air