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WorksheetsElements And Compounds
Total questions: 25
Worksheet time: 15mins
Name
Class
Date
1.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
2.
When the nails were left outside and allowed to rust during the substance detector activity, what new substance was created?
a)
Mud
b)
Rust
c)
Grass
d)
Water
3.
Is water an element or a compound?
a)
Element
b)
Compound
4.
The properties of the elements that make up a compound are usually very similar to the compound itself.
a)
True
b)
False
5.
Water (H2O) freezing is an example of:
a)
A chemical change
b)
A physical change
6.
A compound consists of two or more elements bound together.
a)
True
b)
False
7.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
8.
You drop two Alka-Seltzer tablets in a glass of water and immediately see bubbles coming up through the water. They probably indicate:
a)
A change of color
b)
Formation of a gas
c)
A change in temperature
d)
Formation of a precipitate
9.
A chemical change always results in the formation of a:
a)
explosion
b)
big mess
c)
new substance
d)
new state of matter
10.
When we mixed milk and vinegar in the lab demonstration, a/an ______________ was created.
a)
cheese
b)
new food
c)
precipitate
d)
element
11.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
12.
Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?
a)
Compound
b)
Element
c)
Mixture
d)
None of the Above
13.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
14.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
15.
Which of the following an element?
a)
Carbonic Acid
b)
Copper
c)
Iron and Copper
d)
Water
16.
The chemical symbol of an element always matches the element's name.
a)
Agree
b)
Disagree
17.
Both elements and compounds are pure substances.
a)
Agree
b)
Disagree
18.
Two or more different elements chemically combine to form compounds.
a)
Agree
b)
Disagree
19.
Every compound has a chemical formula.
a)
Agree
b)
Disagree
20.
contains only 1 type of atom
a)
element
b)
compound
c)
mixture
21.
These can only be separated by chemical means.
a)
element
b)
compound
c)
mixture
d)
stuff
22.
These contain only one kind of atom.
a)
element
b)
compound
c)
mixture
d)
water
23.
The air is a _________.
a)
element
b)
mixture
c)
compound
d)
energy
24.
Water is a ___________.
a)
element
b)
mixture
c)
compound
25.
The things in a mixture always retain their........
a)
smell properties
b)
physical and chemical properties
c)
shape
d)
color
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