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Elements & Compounds

Total questions: 85

Worksheet time: 1hrs 17mins

Name
Class
Date
1.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
2.
Is water an element or a compound?
a)
Element
b)
Compound
3.
A compound consists of two or more elements bound together.
a)
True
b)
False
4.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
5.
Element:Fe
a)
Gold
b)
Flourine
c)
Phosphorus
d)
Iron
6.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
7.
How many elements are in HHe
a)
3
b)
4
c)
2
d)
5
8.
What does the element AI stand for ?
a)
Gold
b)
Actinium
c)
Iron
d)
Aluminum
9.

Is salt (NaCI) a compound or a element?

a)

Compound

b)

element

10.
which one can be found on the periodic table
a)
Compound 
b)
Element
11.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
12.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
13.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
14.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
15.
Which of the following an element?
a)
Carbonic Acid
b)
Copper
c)
Iron and Copper
d)
Water
16.
a)
1
b)
2
c)
3
d)
4
17.
a)
1
b)
2
c)
3
d)
4
18.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
19.

He

Based on this symbol, what can you tell about Helium (He)?

a)

Helium is a compound

b)

Helium is an element

c)

helium is a metal

d)

helium is a mixture

20.

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

21.

Which list contains only elements and a reason why they are elements?

a)

H2O, NaCl, N2, CO2, Substances are elements because they they contain more than one chemical symbol.

b)

Kr, Ne, Ar, He, Substances are elements because they are noble gases.

c)

Cl2, H2, Na, He, Substances are elements because they are made of one type of atom.

d)

F2, O2, Li, H, Substances are elements because they all have chemical reactions.

22.

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

23.

How many elements are present in this compound?

NaHCO3

a)

1

b)

2

c)

3

d)

4

24.

How many elements are in this compound?

B6Cl2OH

a)

4

b)

3

c)

2

d)

1

25.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
26.

What elements make up the compound, H2SO4 ?

a)

hydrogen, sulfur, oxygen

b)

hydrogen, silicon, oxygen

c)

helium, sodium, oxygen

d)

hydrogen, sulfur, carbon

27.
In general, metals are _____. 
a)
poor conductors of heat
b)
brittle
c)
poor conductors of electricity 
d)
good conductors of heat
28.

Sulfur is a

a)

Metal

b)

Nonmetal

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 Elements & Compounds
d)
Mixture of Compounds
32.
Classify the picture with the correct label.
a)
Compounds
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements & Compounds
33.
Classify the picture with the correct label.
a)
Mixture of Elements
b)
Compound
c)
Mixture of Compounds
d)
Element
34.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Compounds
d)
Mixture of Elements
35.

A pure substance...

a)

is an element or a compound

b)

is only an element, not a compound

c)

is only a compound, not an element

d)

is neither an element or a compound

36.

A pure substance made of only one type of atom is called —

a)

an element

b)

a mixture

c)

a compound

d)

a salt

37.
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.
38.
What is an example of an element?
a)
Oxygen
b)
Pure water
c)
Air
d)
Table salt
39.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
40.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
41.
Salt has a chemical formula of NaCl.  Salt is a...
a)
Compound
b)
Element
c)
Mixture
d)
None of the Above
42.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
43.

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.

44.

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.

45.

Carbon is a(n) ______

a)

compound

b)

element

c)

mixture

46.

Carbon Dioxide (CO2) is a ______

a)

compound

b)

element

c)

mixtures

d)

Battle of Bunker Hill

47.

Sand is settling on the bottom of this beaker full of water. Which statement is true?

a)

Sand is less dense than water.

b)

Sand has equal density with water.

c)

Sand is more dense than water.

d)

Water is more dense than sand.

48.
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
a)
methane is an element and carbon and hydrogen are compounds.
b)
carbon, hydrogen, and methane are all elements.
c)
carbon, hydrogen, and methane are all compounds.
d)
carbon and hydrogen are elements and methane is a compound.
49.

Which two are the most abundant elements in the atmosphere?

a)

Nitrogen and Carbon

b)

Nitrogen and Hydrogen

c)

Nitrogen and Oxygen

d)

Oxygen and Argon

50.

Which two elements are the most abundant in the lithosphere (earth's crust)?

a)

Silicon and Sodium

b)

Oxygen and Silicon

c)

Oxygen and Sodium

d)

Magnesium and Potassium

51.

What are two most abundant elements in the hydrosphere (Oceans)?

a)

Oxygen and Hydrogen

b)

Oxygen and Chlorine

c)

Hydrogen and Chlorine

d)

Oxygen and All Others

52.

What are the two most abundant elements in the biosphere (human body)?

a)

Carbon and Phosphorus

b)

Oxygen and Nitrogen

c)

Carbon and Nitrogen

d)

Oxygen and Carbon

53.

What are the characteristics of non-metals?

a)

brittle, malleable, and dull

b)

brittle, luster, and poor conductor

c)

brittle, dull, and poor conductor

d)

luster, good conductor, and malleable

54.

What are the characteristics of metals?

a)

dull, poor conductor, and brittle

b)

luster, good conductor, and brittle

c)

luster, good conductor, and malleable

d)

malleable, luster, and poor conductor

55.

Which elements are found here?

a)

metals

b)

non-metals

c)

metalloids

d)

compounds

56.

Which elements are found here?

a)

metals

b)

non-metals

c)

metalloids

d)

compounds

57.

Which elements are found here?

a)

metals

b)

non-metals

c)

metalloids

d)

compounds

58.

The mass of an object was 5 grams and the volume was 10 cm3. What is the density of the object?

a)

2 g/cm3

b)

15 g/cm3

c)

5 g/cm3

d)

0.5 g/cm3

59.

What is the total number of elements in Vinegar: HC2H3O2

a)

4

b)

3

c)

7

d)

8

60.

What is the chemical symbol for Sulfur?

a)

Su

b)

S

c)

Sf

d)

Si

61.
What is the MOLECULAR MODEL for the chemical formula above?
a)
C-C-O
b)
C-O-O
c)
C O
d)
C-C-O-O
62.
What is the CHEMICAL FORMULA for the molecular model pictured above?
a)
CH
b)
C4H4
c)
CH4
d)
C4H
63.
What is the MOLECULAR MODEL for the chemical formula above?
a)
H-O-O
b)
H O O
c)
H-O
d)
H-H-O
64.
What is the CHEMICAL FORMULA for the molecular model pictured above?
a)
CH2O
b)
C2H2O2
c)
CHO2
d)
CHO
65.
What ELEMENTS are present in the chemical formula: CH4
a)
Carbon and Helium
b)
Carbon and Hydrogen
c)
Calcium and Hydrogen
d)
Copper and Helium
66.

What is the color of hydrogen atom in CH4 molecule ?

a)

Red

b)

Black

c)

White

67.

This picture represents which of the following?

a)

element

b)

compound

68.

This picture represents which of the following:

a)

element

b)

compound

69.

This picture represents which of the following?

a)

element

b)

compound

70.

This picture represents which of the following?

a)

element

b)

compound

71.

This picture represents which of the following?

a)

element

b)

compound

72.
Is water an element or a compound?
a)
Element
b)
Compound
73.

How many elements are represented in the compound?

Na2CO3

a)

1

b)

2

c)

3

d)

4

74.
Which of these grouping of elements could have the characteristic of brittle?
a)
Metal
b)
Nonmetal
75.
Which of the following is a good conductor of heat?
a)
Metal
b)
Nonmetal
c)
Metalloid
76.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
77.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
78.
All of these properties describe metals except...
a)
malleable
b)
conductors
c)
brittle 
d)
shiny
79.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
type of sun flower
80.
Which element is a metalloid?
a)
Titanium
b)
Selenium
c)
Potassium
d)
Polonium
81.
Molly investigated if the age of students caused them to be better drivers. What is the dependent variable?
a)
Type of car
b)
Skill of driving
c)
Age of student
82.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
Type of sunflower
83.
Molly investigated if the age of students caused them to be better drivers. What is the independent variable?
a)
Type of car
b)
Skill of driving
c)
Age of student
84.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
85.
Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.
a)
Color or chair
b)
Grade on test
c)
Age of students

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