Chemistry Review

Define: Element

• A pure substance composed of the same type of atom

• A single particle composed of protons, neutrons and electrons

• a group of atoms bonded together

• A substance made of more than one type of atom

Define: Molecule

• A pure substance composed of the same type of atom

• A single particle composed of protons, neutrons and electrons

• a group of atoms bonded together

• A substance made of more than one type of atom

Define: Compound

• A pure substance composed of the same type of atom

• A single particle composed of protons, neutrons and electrons

• a group of atoms bonded together

• A substance made of more than one type of atom

Define: atom

• A pure substance composed of the same type of atom

• A single particle composed of protons, neutrons and electrons

• a group of atoms bonded together

• A substance made of more than one type of atom

Determine the chemical formula for the molecule below

• $CO_2$

• $C_2O$

• $Co_2$

• $co_2$

Symbol for Aluminium

• Al

• Au

• Ag

• Am

Symbol for Calcium

• C

• Ca

• Ce

• Cl

Symbol for Gold

• Au

• Ag

• Go

Symbol for Helium

• H

• He

• Hl

• Hf

Symbol for Oxygen

• $O$

• $O_2$
  
  
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• $o$

• $o_2$