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WorksheetsElements and Compounds
Total questions: 28
Worksheet time: 17mins
DIFFERENT kinds of atoms chemically combine to form a pure substance called
This is made up of one or more of the SAME kind of atom
Element
Mixture
Compound
Matter
In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?
I
II
III
IV
Beatriz wants to make a mixture out of her bowl of blueberries. Which of the following would turn her bowl of blueberries into a mixture?
adding more blueberries to the bowl
adding raspberries to the bowl
cutting up the blueberries
mashing the blueberries
Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?
Oxygen is more reactive than air.
Oxygen has a higher density than air.
Oxygen goes under a phase change, whereas air is always a gas.
Oxygen contains only one substance, but air contains several substances.
Represented by a chemical symbol on the Periodic Table
Element
Compound
Mixture
Impure substance
Represented by a chemical formula
Element
Compound
Mixture
A combination of different substances that can be easily (physically) separated is
element
compound
mixture
pure substance
Which of these are elements?
Air (O2 and N2 and H2O and CO2)
Ge
N2
CO2
Salt water (NaCl, H2O) is a(n)-
element
compound
mixture
What's the smallest particle of an element?
atom
molecule
compound
proton
What's the smallest particle of a compound?
atom
molecule
element
proton
A pure substance that is formed from chemically combining atoms of two or more elements
element
compound
mixture
A pure substance that cannot be broken down into a simpler substance by chemical of physical changes.
element
compound
mixture
