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WorksheetsCompounds and Mixtures
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
In a mixture, substances
a)
keep their properties
b)
have a definite chemical composition
c)
lose their properties
d)
combine chemically
2.
Water is an example of
a)
element
b)
compound
c)
mixture
d)
an ion
3.
A molecule of sugar contains carbon and
a)
hydrogen
b)
oxygen
c)
sodium
d)
hydrogen and oxygen
4.
Ions that repeat in a regular pattern form a
a)
structural formula
b)
compound
c)
crystal lattice
d)
mixture
5.
Organic compounds used to build and repair the body are
a)
proteins
b)
cholesterol
c)
carbohydrates
d)
lipids
6.
Organic compounds contain the element
a)
hydrogen
b)
carbon
c)
oxygen
d)
nitrogen
7.
In a covalent bond, electrons are
a)
gained
b)
lost
c)
traded
d)
transferred
8.
Two or more substances that have been combined but not chemically changed makeup
a)
mixture
b)
element
c)
compound
d)
ion
9.
An ion is formed when an atom gains or loses
a)
a neturon
b)
an electron
c)
a proton
d)
a neutron or proton
10.
A molecule of water contains two hydrogen atoms joined to one
a)
nitrogen atom
b)
carbon atom
c)
sodium atom
d)
oxygen atom
11.
Cholesterol is a harmful
a)
carbohydrate
b)
lipid
c)
amino acid
d)
protein
12.
Carbon atoms can join together other atoms in a
a)
double bond
b)
single bond
c)
triple bond
d)
all the above
13.
A type of carbohydrate is
a)
sugar
b)
cheese
c)
eggs
d)
milk
14.
A substance made up of two or more elements that have been chemically combined
a)
mixture
b)
substance
c)
compound
d)
ion
15.
A compound
a)
can be separated by physical means
b)
can be separated by chemical means
c)
no definite chemical composition
d)
cannot be separated by chemical means
16.
A neutral atom becomes a positive ion when it
a)
gains an electron
b)
loses a proton
c)
loses an electron
d)
gains proton
17.
Atoms complete their outer energy levels by
a)
gaining electrons
b)
sharing electrons
c)
losing electrons
d)
transferring or sharing electrons
18.
The main source of energy in humans comes from
a)
amino acids
b)
carbohydrates
c)
proteins
d)
lipids
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