Chemical Symbols and Chemical Reactions

Hydrogen	Carbon	Oxygen	Sodium	Magnesium
Sulphur	Chlorine	Potassium	Calcium	Copper

You will have to learn these, and other, chemical symbols for the terminal GCSE exam. For the other chemical symbols have a look at the periodic table (you don't have to learn all of them).

 

Now answer these questions

1. What is the chemical symbol for magnesium ?
2. What is the chemical symbol for copper ?
3. What is the chemical symbol for hydrogen ?
4. What is the chemical symbol for calcium ?
5. What is the chemical symbol for sodium ?
6. What is the chemical symbol for oxygen ?
7. What is the chemical symbol for chlorine ?
8. What is the chemical symbol for potassium ?

You scored out of 8 on that test

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Last lesson we saw how four hydrogen atoms can join to one carbon atom to form methane. So methane is a molecule with one carbon atom and four hydrogen atoms - the chemical symbol for this molecule is: CH4. The molecule sodium chloride is joined by ionic bonds: it contains one sodium atom and one chlorine atom - its chemical formula is NaCl.

 

Now answer these questions:

1. What is the chemical formula for sodium chloride ? - SCl NaCl ClNa
2. What is the chemical formula for potassium chloride ? - KCl PCl ClP
3. What is H₂O ? - hydrogen water hydrogen peroxide
4. What is the chemical formula for sodium hydroxide ? - SH NaH NaOH
5. What is the chemical formula for potassium fluoride ? - PF KF FK
6. Wha gas is H₂ ? - helium halogen hydrogen
7. What is the chemical symbol for potassium bromide ? - KB PBr KBr
8. What is O₂ ? - hydroxide oxygen gas oxide
9. What is CH₄ ? - methane carbon ethane
10. What is C₂H₅OH ? - ethanol - a type of alcohol methane - an alkane acetylene - an alkyne

You scored out of 10 on that test