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Worksheets

Elements and Compounds

Total questions: 38

Worksheet time: 29mins

Name
Class
Date
1.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
2.

Use your Periodic Table to identify the elements below based on its

symbol. Write the name of the element in the space provided.


S

a)

Sulfur

b)

Salt

c)

Selenium

d)

Silicon

3.

Use your Periodic Table to identify the elements below based on its

symbol. Write the name of the element in the space provided.


Na

a)

Silicon

b)

Hydrogen

c)

Lithium

d)

Sodium

4.

Use your Periodic Table to identify the elements below based on its

symbol. Write the name of the element in the space provided.


Cl

a)

Calcium

b)

Carbon

c)

Chlorine

d)

Chromium

5.

Use your Periodic Table to identify the elements below based on its

symbol. Write the name of the element in the space provided.


N

a)

Neon

b)

Nitrogen

c)

Sodium

d)

Krypton

6.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
7.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements and Compounds
d)
Mixture of Elements
8.
Classify the picture with the correct label.
a)
Compounds
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements & Compounds
9.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Compounds
d)
Mixture of Elements
10.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements & Compounds
d)
Mixture of Elements
11.
Classify the picture with the correct label.
a)
Mixture of Elements
b)
Mixture of Elements & Compounds
c)
Mixture of Compounds
d)
Compounds
12.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
13.
Salt has a chemical formula of NaCl.  Salt is a...
a)
Compound
b)
Element
c)
Mixture
d)
None of the Above
14.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
15.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
16.
A combination of substances that are not chemically combined is called a(n)____________. 
a)
mixture
b)
compound
c)
physical
17.

An element is made up of only one kind of ___________.

a)

isotope

b)

plastic

c)

atom

d)

metal

18.

A ___________ contains 2 or more elements that are chemically combined

a)

element

b)

compound

c)

mixture

19.

An ___________ contains only 1 type of atom

a)

element

b)

compound

c)

mixture

20.

Gold, Au, is an example of a(n)

a)

element

b)

compound

c)

mixture

21.

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

a)

1

b)

2

c)

3

d)

4

22.

Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is

a)

an element made of carbon and oxygen atoms.

b)

a solution made of carbon and oxygen atoms.

c)

a compound of carbon and oxygen atoms.

d)

a mixture of carbon and oxygen atoms.

23.

Sam's mother is cooking breakfast in a cast-iron frying pan. If the pan is made only of iron, what can Sam conclude?

a)

The pan is a pure substance with the chemical symbol Ir.

b)

The pan is a pure substance with the chemical symbol I.

c)

The pan is a pure substance with the chemical symbol F.

d)

The pan is a pure substance with the chemical symbol Fe.

24.

Neon

a)

N

b)

No

c)

Ne

d)

Nn

25.

Calcium

a)

Cl

b)

Ca

c)

C

d)

Cm

26.

Helium

a)

He

b)

Hl

c)

HE

d)

Hm

27.

Hydrogen

a)

Hy

b)

H

c)

Hr

d)

Hn

28.

N

a)

Sodium

b)

Nitrogon

c)

Nonium

d)

Nitrogen

29.

Gold

a)

Go

b)

Gl

c)

AU

d)

Au

30.

Pb

a)

Gold

b)

Lead

c)

peanut butter

d)

Paribium

31.

Iron

a)

Ir

b)

In

c)

Fe

d)

FE

32.

Nickel

a)

Ni

b)

N

c)

Nl

d)

Nc

33.

Mercury

a)

Me

b)

Hg

c)

HG

d)

ME

34.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
35.
Which is the correct formula for:
one carbon (C)
two oxygen (O)
a)
CO2
b)
CO
c)
C2O
d)
2CO
36.
How many elements are in H2O?
a)
1
b)
2
c)
3
d)
4
37.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
38.
What is Fe2O3
(rust) made up of?
a)
1 flourine, 2 einsteinium,
3 oxygen
b)
2 fluorine, 3 oxygen
c)
2 iron, 3 oxygen
d)
2 iron, 3 osmium

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