Start of chemistry AS -revision

1- H - Hydrogen

2- He- Helium

3-Li- Lithium

4-Be-Beryllium

5-B- Boron 

6- C-Carbon

7-N- Nitrogen 

8-O-Oxygen 

9- F-Fluorine

10-Ne-Neon

11-Na-Sodium

12-Mg- Magnesium

13-Al-Aluminium

14-Si-Silicon

15-P- Phospherous

16-S-Sulphur

17-Cl-Chlorine

18-Ar-Argon

19-K-Potassium

20-Ca-Calcium

21- Sc-Scandium

22-Ti-Titianium

23-V-Vanadium

24-Cr-Chromium

25-Mn-Manganese

26-Fe-Iron

27-Co-Cobolt

28-Ni-Nickel

29-Cu-Copper

30-Zn-Zinc

NaOH- sodium hydroxide

KOH- potassium hydroxide

Ca(OH)small 2 - calicium hydroxide

Na2CO3 both numbers small- sodium carbonate7

Acids

HCl- hydrochorlic acid

HNO3-Nitric acid

H3PO4= Phosphoric acid 

H2SO4- Sulphuric acid

NH4 +=Ammonium ion       Please note the charges are the numbers / symbols after

OH - = Hydroxide ion         the space and all numbers should be lower case 

NO-3 -=Nitrate(V)ion

SO4 -2= Sulfate (VI) ion

CO3 -2= Carbonate ion 

HCO3 -= Hydrogencarbonate ion - uncomman

PO4 3- Posphate(V) ion

CrO4 2- =Chromate(VI) ion

Cr2O7 -2= dichromate(VI) ion 

MnO4 - = manganate (VII) ion

Fe= +2 or+3

Cu= + or +2

Ag=+