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WorksheetsChemical Formulae
Total questions: 18
Worksheet time: 9mins
CaCO3 represents
Sodium bicarbonate
Sodium carbonate
Sodium Chloride
Calcium Carbonate
The smallest unit of matter which can exist independently is called
an atom
a molecule
a compound
an element
How many atoms of sulfur are in each molecule of H2SO4?
1
4
2
7
How many atoms are there in the compound MgCO3?
3
4
5
6
Which elements are in this compound?
H2O
helium and oxide
hydrogen and oxygen
water
waterium and oxygen
What is the correct way to write the formula for the model of this compound?
2H20
2H2O
2HO2
H2O2
How many atoms of oxygen does copper sulfate (CuSO4) contain?
1
2
3
4
How many atoms of iron does iron oxide (Fe2O3) contain?
1
2
3
5
What is the total number of oxygen atoms in Ca3(PO4)2?
2
4
6
8
40
Classify the Sample.
Pure Substance
Mixture of Elements
Mixture of Compounds
Mixture of Elements and Compounds
Which is the best description of one particle of table salt (NaCl)?
mixture
compound
element
