my another chem(chem formulae) notes

Valency Positively Charged Ions Negatively Charged ions
1 sodium Na^+ Chloride CI^-
potassium K^+ Bromide Br^-
hydrogen H^+ Iodide I^-

silver Ag^+ hydroxide OH^-
copper(I) Cu^+ Nitrate NO3^-
ammonium NH4^+ hydrogen carbonate HCO3^-
hydrogen sulphate HSO4^-

2 magnesium Mg^2+ oxide O^2-
calcium Ca^2+ sulphide S^2-

lead(II) Pb^2+ sulphate SO4^2-
copper(II) CU^2+ sulphite SO3^2-
zinc Zn^2+ Carbonte CO3^2-
barium Ba^2+
Iron(II) Fe^2+

3 phosphate PO4^3-
aluminium AI^3+
iron (III) Fe^3+
ammonia gas NH3+

in general,

Xm + Yn -> XnYm
If m = n, then write XY

e.g. write the formulae for the following compounds
sodium hydroxide
NA^+ OH^- => NaOH
magnesium carbonate
Mg^2+ CO3^2- => Ca(NO3)2




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