The chemical symbol for .................. is O.
Oxygen
Different elements or compounds that are not joined together chemically.
Mixture
Have many different types of atoms have been made in laboratories?
24
What is the formula for Carbon Dioxide?
CO2
Mixture of Carbon Dioxide, Nitrogen, Oxygen and Water Vapor.
Air
Most common element found in the Earth's crust.
Oxygen
Most common metal found in the Earth's crust.
Aluminium
The chemical symbol for .................. is C.
Carbon
Element or Compound?
Element
A molecule of oxygen is made from ............. atoms of oxygen joined together.
Two
How many different types of atoms occur naturally in the Universe?
94
Element or Compound?
Compound
The rows in the Periodic Table are called...
Periods
Chemical term for two atoms joining tightly together.
Bonding
Compound or Mixture?
Compound
"Building block" of all matter that surround us.
Atom
Complete the word equation:
Calcium + Carbon + ..................... = Calcium Carbonate
Oxygen
Compound or Mixture?
Mixture
The chemical symbol for .................. is Cl.
Chlorine
When you read each row across the Periodic Table, from left to right, the mass of the atoms ........................
Increase
Greek philosopher who suggested that everything was made up of tiny pieces.
Democritus
The chemical symbol for .................. is He.
Helium
Group of atoms joined tightly together.
Molecule
Compound or Mixture?
Compound
Element with the smallest mass in the Periodic Table.
Hydrogen
Substance that is made of just one kind of atom.
Element
Substance that are made up more than one kind of atom.
Compound
Compound or Mixture?
Mixture
The columns in the Periodic Table are called..
Groups
What is the formula for Carbon Monoxide?
CO
Element or Compound?
Compound
The chemical symbol for .................. is Na.
Sodium
What is the formula for Sodium Chloride?
NaCl
Compound or Mixture?
Mixture
Compound or Mixture?
Compound
Most common element found in the Universe.
Hydrogen