WorksheetsElements compounds mixtures
Total questions: 20
Worksheet time: 10mins
Which is the best example of a pure substance?
pizza
gold
saltwater
air
Which substance is a compound?
copper
magnesium
saltwater
water
What kind of substance is composed of two or more elements that are chemically combined?
element
mixture
solution
compound
Table salt, or sodium chloride has the chemical formula NaCl. How is sodium chloride classified?
as an element
. as a compound
as a mixture
as a liquid
How are mixtures separated?
Chemical changes
Physical Changes
Chemical Properties
Physical Properties
Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?
compound
mixture
pure substance
element
Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?
an element
compound
mixture
suspension
Identify the correct chemical symbol for the element Iron
FE
Fe
Ir
I
A compound has different physical properties to the elements that it is formed from.
True
False
