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Worksheets

Elements, Compounds, Mixtures, & Counting atoms

Total questions: 76

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

Ba

a)

Compound

b)

Element

c)

Mixture

2.

KCl2

a)

Compound

b)

Element

c)

Mixture

3.

H3O

a)

Compound

b)

Element

c)

Mixture

4.

Lucky Charms Cereal

a)

Compound

b)

Element

c)

Mixture

5.

H

a)

Compound

b)

Element

c)

Mixture

6.

Chocolate Chip Muffin

a)

Compound

b)

Element

c)

Mixture

7.

Koolaid

a)

Compound

b)

Element

c)

Mixture

8.

Fe2

a)

Compound

b)

Element

c)

Mixture

9.

Mg

a)

Compound

b)

Element

c)

Mixture

10.

Salt (NaCl)

a)

Compound

b)

Element

c)

Mixture

11.

What type of mixture is trail mix?

a)

compound

b)

heterogeneous

c)

homogeneous

12.

What type of mixture is salsa

a)

compound

b)

heterogeneous

c)

homogeneous

13.

What type of matter is this?

a)

compound

b)

element

c)

mixture

14.

What type of matter is this?

a)

compound

b)

element

c)

mixture

15.

What type of matter is this?

a)

compound

b)

element

c)

mixture

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.
1 A substance made up of two or more chemically combinedelements is —
a)
an element
b)
mixture
c)
compound
d)
solution
19.
 A substance that cannot be broken down into any other substance by ordinarychemical means is called —
a)
molecule
b)
mixture
c)
element
d)
compound
20.
Two or more physically combined substances form —
a)
a compoud
b)
an acid
c)
an element
d)
a mixture
21.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
22.
What is an example of a mixture?
a)
Table salt
b)
Salt water
c)
Oxygen
d)
Air
23.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
24.
Which of these substances is an example of a solution?
a)
milk
b)
sweet tea
c)
mercury
d)
concrete
25.
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.
26.
What is an example of an element?
a)
Oxygen
b)
Pure water
c)
Air
d)
Table salt
27.
Two or more substances in the same place but NOT chemically combined or in a specific ratio is called —
a)
a compound 
b)
a pure substance
c)
an element
d)
a mixture
28.
A compound is made of ________ atoms. 
a)
big 
b)
similar 
c)
different 
29.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
30.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
31.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

32.

Beatriz wants to make a mixture out of her bowl of blueberries. Which of the following would turn her bowl of blueberries into a mixture?

a)

adding more blueberries to the bowl

b)

adding raspberries to the bowl

c)

cutting up the blueberries

d)

mashing the blueberries

33.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
34.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
35.
a)
Element
b)
Compound
c)
Mixture of compound and element
d)
Mixture of two elements
36.

How would you classify this image?

a)

homogeneous mixture

b)

heterogeneous mixture

37.

How would you classify this image?

a)

homogeneous mixture

b)

heterogeneous mixture

38.

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

a)

Element

b)

Compound

c)

Mixture

d)

Solution

39.

What is a type of mixture in which different parts can easily be seen (Ex. Vegetable soup)?

a)

Heterogeneous mixture

b)

Homogeneous mixture

c)

Solution

d)

Colloid

40.

What is a well-mixed mixture containing a solvent and at least one solute that has the same properties throughout (Ex. Sugar water)?

a)

Heterogeneous mixture

b)

Colloid

c)

Suspension

d)

Solution

41.

What is a type of mixture that is evenly mixed so you cannot see the parts and it looks all the same (Ex. Paint)

a)

Element

b)

Compound

c)

Heterogeneous mixture

d)

Homogeneous mixture

42.

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

a)

Element

b)

Compound

c)

Colloid

d)

Suspension

43.

What is a mixture in which particles can be seen seen and settle out over time (Ex. Muddy water)?

a)

Solution

b)

Suspension

c)

Colloid

d)

Element

44.

What is a mixture containing small, undissolved particles that do not settle out over time (Ex. Fog)?

a)

Solution

b)

Suspension

c)

Colloid

d)

Compound

45.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
46.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
47.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
48.
If you change a substance into a new substance...
a)
Partial Change
b)
Physical Change
c)
Chemical Change
d)
Freezing
49.
Changing the phase, size or shape of something....
a)
Chemical change
b)
Physical Change
c)
Suspension
d)
Colloid
50.
Which is NOT a chemical change?
a)
Leaves changing colors in the fall
b)
Iron rusting
c)
Digesting Lunch
d)
Ice Melting
51.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
52.

How man atoms of carbon are there?

a)

1

b)

2

c)

3

d)

4

53.

How many atoms of Iron are in this compound?

a)

1

b)

2

c)

3

d)

4

54.

How many atoms of hydrogen are in

C6H12O6

a)

6

b)

12

c)

18

d)

2

55.

A substance made up of atoms of two or more different elements joined by chemical bonds

a)

Molecule

b)

compound

c)

polar covalent bond

d)

nonpolar covalent bond

56.

How many different elements are present in H2COCH2

a)

5

b)

4

c)

3

d)

2

57.

Calculate the number of Oxygen atoms in Al(OH)3

a)

1

b)

2

c)

3

d)

4

58.

How many total POTASSIUM atoms are in this formula?

a)

8

b)

2

c)

4

d)

12

59.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

60.

Coefficients in chemical formulas...

a)

Multiply just the first atom

b)

Add to the subscripts at the end of the molecule

c)

Multiply elements without subscripts

d)

Multiply EVERYTHING!

61.

C3H5(NO3)3

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

62.

Which one is the coefficient 4H2O?

a)

4

b)

H

c)

2

d)

O

63.

How many Oxygen atoms are in H2O?

a)

1

b)

2

c)

0

64.

How many atoms are there TOTAL in H2SO4

a)

6

b)

5

c)

7

65.

A subscript is the small number below the element symbol that tells the number of _______ of that element.

a)

atoms

b)

protons

c)

valence electrons

66.

How many Aluminum atoms are in Al2O3

a)

3

b)

5

c)

2

67.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

1

c)

2

68.

How many Elements are in the compound C2H8O

a)

2

b)

3

c)

1

69.

A capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

a)

element

b)

subscript

c)

coefficient

70.

Which one is the subscript 4H2O

a)

4

b)

H

c)

2

d)

O

71.

How many Hydrogen atoms are in 4H2O?

a)

8

b)

12

c)

4

72.

Which is an element?

a)

2

b)

H

c)

3

73.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

74.
How many atoms of Hydrogen are in this compound
a)
1
b)
2
c)
3
d)
4
75.

How many total atoms are in the compound C2H8O ?

a)

11

b)

2

c)

8

d)

1

76.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O

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