WorksheetsElements, Compounds and Mixtures
Total questions: 7
Worksheet time: 2mins
Which list contains an element, a compound and a mixture?
Air, copper, soil
air, pure water, sodium chloride
copper, soil, pure water
tap water, soil, sodium chloride
Substances can be broadly classified into three categories, which are elements, compounds and mixtures. Which of the following statement is correct?
Elements contain different atoms.
Compounds consists of elements that are not chemically combined.
Mixtures consist of elements that are chemically combined.
A mixture can contain elements and compounds.
The smallest particles of an element that have the chemical properties of that element.
monoatomic element
diatomic element
atoms
ions
What is the total number of atoms present in one unit of chromium(III) sulfate, Cr2(SO4)3?
3
7
15
17
which of the following describes a mixture?
its components can be separated by physical means
its components is fixed
the properties of its components are different from that of the mixture
two or more substances are chemically combined
Two elements R and S combine to form the compound RS2. Which of the following statements are true?
An energy change occurs when RS2 is formed
RS2 will have a colour in between those of R and S.
RS2 will have the properties of both R and S.
The ratio of R : S atom is 2:1
When a green solid X is heated, it forms a black solid and a gas. Therefore, X ....
does not contain a metal
is a compound made up of at least two elements
is a mixture of two elements
must be a mixture because it can be separated into two substances.
