names and formula of compounds

1 if one is hydrogen, give its name first

2 otherwise name the one with lower group number first

3 then give the name of second non metal, ending with -ide

​compound contains nonmetal and non metal

1 give the name of metal first

2 then name the non-metal ending with -ide

example magnesium bromide

compound contains metal and non metal

rules to name a compound

review : name and formula of compound

the formulae of compounds

​Some text here about the topic of discussion.

the formula for an ionic compounds tells the type and ratio of the ions in the compounds

ionic compounds

the formula for a molecular compound tell the type and number of each atom in one molecule

molecular compounds

1. finding the formula from the structure of compound

review : name and formula of compound

​2. finding a formula using valency

Multiple Choice

which one is the structure of sulfur trioxide?

• SO2

• SO3

Multiple Choice

which one is the structure of tetra phosphorus decoxide?

• P4O10

• P4O6

Multiple Choice

which one is the structure of phosphorus(V) oxide or diphosphorus pentoxide?

• P2O5

• P4O10

Multiple Choice

which one is the structure of ethanol?

• C2H5OH

• CH3COOH

Multiple Choice

which one is the structure of sodium thiosulfate ? it contains of Na⁺ and S₂O₃^2-

• NaS2O3

• Na2S2O3

Multiple Choice

which one is the structure of calcium hydrogen carbonate ? it contains of Ca²⁺ and HCO₃^-

• CaHCO₃

• Ca(HCO₃)₂

Multiple Choice

which one is the structure of ammonium sulfate ? it contains of NH₄⁺ and SO₄^2-

• (NH4)(SO4)

• (NH₄)₂(SO₄)

Multiple Choice

the formula of ethanoic acid is CH3COH

• correct

• wrong

Multiple Select

which following formula are incorrect?

• HBr2

• NaF2

• MgO2

• CaCl2