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Elements, Compounds and Mixtures

Total questions: 64

Worksheet time: 48mins

Name
Class
Date
1.

What are atoms?

a)

The largest piece of matter

b)

The smallest piece of matter

c)

Many types of elements mixed together

d)

One type of element mixed together

2.

What is an element?

a)

A molecule that has more than one type of atom bonded together

b)

A substance such as water

c)

The same type of atoms

d)

Different types of atoms

3.

What is a molecule?

a)

A group of atoms held together by chemical bonds

b)

A single atom next to another atom

c)

ONLY one type of atom bonded together

d)

ONLY different types of atoms bonded together

4.

Chemical bonds...

a)

are represented by an element symbol (such as O for Oxygen)

b)

Hold mixtures together

c)

Hold multiple atoms together and can be separated by physical means

d)

hold multiple atoms together and must be separated by chemical means

5.

Molecules that have two or more different types of atoms are called

a)

Element

b)

Compound

c)

Mixture

d)

Chemical Bonds

6.

This shows what elements are in a molecule and how many atoms

a)

Chemical bonds

b)

Element symbol

c)

Subscript

d)

Chemical formula

7.

Contains different elements or compounds that are not chemically bonded

a)

Compound

b)

Element

c)

Mixture

d)

Pure substance

8.

This molecule is a

a)

Compound

b)

Mixture

c)

Element

9.

This is an example of

a)

Element

b)

Compound

c)

Mixture

10.

This is an example of

a)

Element

b)

Compound

c)

Mixture

11.

When a substance is made up of components that are not chemically bonded, we call that a _______.

a)

Element

b)

Compound

c)

Mixture

12.

Which of the following would NOT be a compound?

a)

C6H12O6

b)

(SO)4

c)

H2O

d)

Cl3

13.

Fe + S represents a

a)

Element

b)

Compound

c)

Mixture

14.

How many elements have to be present for a molecule to be considered a compound?

a)

1

b)

2 or more

c)

3 or more

d)

4 or more

15.

How many different elements are in this mixture?

a)

1

b)

2

c)

3

d)

4

16.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
17.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
18.
Two or more physically combined substances form —
a)
a compoud
b)
an acid
c)
an element
d)
a mixture
19.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
20.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
21.
Which of the following is a way in which elements and compounds are similar?
a)
Elements and compounds are pure substances.
b)
Elements and compounds are both made up of different kinds of atoms.
c)
Elements and compounds can both be broken down by physical means.
d)
Elements and compounds are listed on the periodic table.
22.
A compound is made of ________ atoms. 
a)
big 
b)
similar 
c)
different 
23.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
24.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
25.
Iced Tea (with ice in it)
a)
Element
b)
Compound
c)
Heterogenous Mixture
d)
Solution
26.
When elements form mixtures, the elements keep their original properties. 
a)
True
b)
False
27.
The air is a _________. 
a)
element 
b)
mixture 
c)
compound 
d)
energy 
28.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
29.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
30.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements and Compounds
d)
Mixture of Elements
31.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Compounds
d)
Mixture of Elements
32.

Anything that takes up space and has mass is

a)

matter

b)

mass

c)

heat

d)

light

33.

The smallest unit of matter is

a)

compound

b)

element

c)

atom

d)

molecule

34.

H2O is an example of

a)

a element

b)

an atom

c)

a mixture

d)

a compound

35.

Which of the following is an example of matter

a)

sound from the radio

b)

light from a light bulb

c)

Air we breathe

d)

light from the sun

36.

Gold is an element so that means that gold contains

a)

one kind of compound

b)

one type of atom

c)

a mixture of many types of atoms

d)

a mixture of many compounds

37.

Matter can be classified into which categories

a)

heterogeneous and homogeneous mixtures

b)

energy and light

c)

pure substances and mixtures

d)

elements and compounds

38.

Mixtures

a)

can be separated physically

b)

are chemically combined

c)

have a chemical formula

d)

are only one thing.

39.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
40.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
41.
A combination of substances that are not chemically combined is called a(n)____________. 
a)
mixture
b)
compound
c)
physical
42.
Which of the following formulae represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
43.
Which one has more than one type of atom in it
a)
Element
b)
Compound 
44.
What is salad?
a)
element
b)
compound
c)
mixture
45.
Are there any compounds on the periodic table?
a)
Yes, there are many 
b)
No, because only elements are on the periodic table
c)
I think they are?
46.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
47.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
48.
What is gold?
a)
element
b)
compound
c)
mixture
49.

When two or more elements combine chemically, they form _________.

a)

DNA

b)

atoms

c)

molecules

d)

compounds

50.

Which of the following substances cannot be decomposed into a simpler substance?

a)

water

H2 OH_{2\ }O

b)

hydrogen HH

c)

salt NaClNaCl

d)

ammonia NH3NH_3

51.

The chemical formula for artificial sweetener is

C7H5NO3SC_7H_5NO_3S  How many different elements are in the artificial sweetener?

a)

17

b)

5

c)

15

d)

4

52.

What is made of only 1 type of atom?

a)

atoms

b)

elements

c)

compounds

d)

mixtures

53.

One way to tell how many elements a compound has is to..

a)

multiply the number

b)

count the capital letters

c)

add up all the numbers

d)

count the letters

54.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
55.

A substance made up of two or more types of atoms that are NOT chemically combined is called a(n)

a)

element

b)

mixture

c)

compound

d)

pure substance

56.

Salt is a _________.

a)

compound

b)

element

c)

homogeneous mixture

d)

heterogeneous mixture

57.

What is an atom?

a)

Smallest possible piece of rock

b)

Smallest possible particle

c)

Largest possible particle

d)

Largest piece of rock

58.

What is this?

a)

Periodic Chart

b)

Element table

c)

Element chart

d)

Periodic table

59.
Element or Compound?
H2O
a)
Element
b)
Compound
60.

1. What is a mixture?

a)

a. A combination of two or more things that can be separated without a chemical reaction.

b)

b. A combination of things that cannot be separated.

61.

Baking soda (NaHCO3)

a)

Heterogeneous mixture

b)

Element

c)

Compound

d)

Homogeneous mixture

62.
Cereal
a)

A good breakfast

b)

Solution

c)

Compound

d)

Mixture

63.

What is Titanium? (Ti)

a)

Element

b)

Compound

c)

Mixture

64.
What is the chemical symbol for Lithium?
a)
H
b)
He
c)
Li
d)
N

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