Advertisements
Advertisements
Question
Give the formulae of the compounds formed from the following sets of elements :
- calcium and fluorine
- hydrogen and sulphur
- nitrogen and hydrogen
- carbon and chlorine
- sodium and oxygen
- carbon and oxygen
Advertisements
Solution
- Compound formed with calcium and fluorine will have the chemical formula CaF2. (valency of Ca is 2 and that of F is 1)
- Compound formed with hydrogen and sulphur will have the chemical formula H2S. (valency of S is 2 and that of H is 1)
- Compound formed with nitrogen and hydrogen will have the chemical formula NH3. (valency of N is 3 and that of H is 1)
- Compound formed with carbon and chlorine will have the chemical formula CCl4. (valency of C is 4 and that of Cl is 1)
- Compound formed with sodium and oxygen will have the chemical formula Na2O. (valency of Na is 1 and that of O is 2)
- Compound formed with carbon and oxygen will have the chemical formula CO2. (valency of C is 4 and that of O is 2, divided by the common factor of 2)
RELATED QUESTIONS
State the chemical symbols for the following elements :
Sodium, Potassium, Iron, Copper, Mercury, Silver.
What is meant by a chemical formula ? Write the formulae of one element and one compound.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).
Give the empirical formula of Acitic Acid CH3COOH.
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium bicarbonate
Write the formula of the following compound:
Iron [II] oxide
