WorksheetsChem 6-4 elements & compounds 1
Total questions: 22
Worksheet time: 16mins
Name
Class
Date
1.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
2.
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
3.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
4.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
5.
Which of the following an element?
a)
Carbonic Acid
b)
Copper
c)
Iron and Copper
d)
Water
6.
How many elements are represented in the compound?
Na2CO3
Na2CO3
a)
1
b)
2
c)
3
d)
4
7.
What is this element...Au
a)
Iron
b)
Titanium
c)
Gold
d)
Flourine
8.
Element:Fe
a)
Gold
b)
Flourine
c)
Phosphorus
d)
Iron
9.
What is the symbol for Calcium
a)
Cl
b)
Ca
c)
Cm
d)
ca
10.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
11.
How many elements are in HHe
a)
3
b)
4
c)
2
d)
5
12.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
13.
which one can be found on the periodic table
a)
Compound
b)
Element
14.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol
15.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
16.
Is water an element or a compound?
a)
Element
b)
Compound
17.
A chemical change always results in the formation of a:
a)
explosion
b)
big mess
c)
new substance
d)
new state of matter
18.
Water ( H2O) is a compound because-
a)
it is made of two different elements
b)
useful to humans
c)
a gas at room temperature
d)
given off by plants
19.
Carbon (C) is considered an element while Carbon Dioxide (CO2) is considered a compound. That is because Carbon Dioxide is -
a)
a gas
b)
made of two elements
c)
given off by plants
d)
useful to us
20.
Tearing paper into small pieces is a -
a)
chemical change
b)
chemical reaction
c)
nuclear reaction
d)
physical change
21.
Your bicycle rust when left outside. This is evidence of a -
a)
chemical change
b)
physical change
c)
nuclear reaction
d)
physical reaction
22.
Which model represents an element as a gas?
a)
b)
c)
d)
100 %
