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WorksheetsElements, Compounds and Mixtures
Total questions: 32
Worksheet time: 28mins
Name
Class
Date
1.
The chemical symbol for Helium is
a)
H
b)
Hg
c)
He
d)
O
2.
An example of matter made of only one element is
a)
water
b)
gold bar
c)
light bulb
d)
salad mixture
3.
What is the most abundant element found in the earth's atmosphere?
a)
Oxygen
b)
Sulfur
c)
Nitrogen
d)
Argon
4.
The two most common elements found in the oceans are. Remember oceans are made up of water.
a)
Sodium and Nitrogen
b)
Oxygen and Aluminum
c)
Iron and Carbon
d)
Oxygen and Hydrogen
5.
Elements are represented by chemical symbol. Symbols are written with
a)
all lower case letters
b)
all capital letters
c)
always only one letter
d)
At least and ONLY one capital letter
6.
The percentage of Nitrogen in the earth's atmosphere is
a)
one percent
b)
seventy-eight percent
c)
fifty percent
d)
twenty-one percent
7.
The smallest part of an element is
a)
proton
b)
atom
c)
compound
d)
mixture
8.
Which of the following statements are characteristics of an element?
I. Made from a mixture
II. a pure substance
III. represented by a symbol
IV. make up matter on Earth
I. Made from a mixture
II. a pure substance
III. represented by a symbol
IV. make up matter on Earth
a)
I,II
b)
I,IV
c)
II,IV
d)
II,III,IV
9.
How many elements are in HHe
a)
3
b)
4
c)
2
d)
5
10.
Which substance is a compound?
a)
Chlorine
b)
Calcium
c)
Table Sugar
d)
Sodium
11.
A substance made by mixing other substances together and being able to then separate is the definition of a
a)
Combination
b)
Solution
c)
Mixture
12.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
13.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
14.
A combination of substances that are not chemically combined is called a(n)____________.
a)
mixture
b)
compound
c)
physical
15.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
16.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
17.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
18.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol
19.
How many elements are represented in the compound?
Na2CO3
Na2CO3
a)
1
b)
2
c)
3
d)
4
20.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
21.
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
22.
Mixtures are separated through ___________changes.
a)
mixture
b)
compound
c)
physical
23.
How is a compound different from a mixture?
a)
Solids, liquids, and gases can form compounds
b)
Each substance in a compound loses its characteristic properties
24.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
25.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
26.
What is salad?
a)
element
b)
compound
c)
mixture
27.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
28.
Review:
What is the formula for density?
What is the formula for density?
a)
D= M x V
b)
D= V / M
c)
D= V+M
d)
D= M / V
29.
What is the term for combining 2 or more atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
30.
What is the name of a single type of atom?
a)
cell
b)
proton
c)
element
d)
atom
31.
What part of an atom is NEGATIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
32.
Which part of an atom is POSITIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
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