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Elements Compounds

Total questions: 73

Worksheet time: 36mins

Name
Class
Date
1.

What is the most abundant element found in Earth's crust, or lithosphere?

a)

Oxygen (O)

b)

Nitrogen (N)

c)

Carbon (C)

d)

Silicon (Si)

2.

What is the most abundant element found in Earth's atmosphere?

a)

Oxygen (O)

b)

Nitrogen (N)

c)

Carbon (C)

d)

Silicon (Si)

3.

What is the most abundant element found in the biosphere, which is made up of all living things?

a)

Oxygen (O)

b)

Nitrogen (N)

c)

Carbon (C)

d)

Silicon (Si)

4.

Which of the following is a pure substance that can be found on the Periodic Table?

a)

elements

b)

compounds

c)

mixtures

d)

none of the above

5.

Which of the following can be separated by physical means?

a)

elements

b)

compounds

c)

mixtures

d)

none of the above

6.

Which of the following is a pure substance that is formed through a chemical reaction?

a)

elements

b)

compounds

c)

mixtures

d)

none of the above

7.

What does this picture represent?

a)

Elements

b)

Compounds

c)

Mixtures

d)

None of the above

8.

What does this diagram represent?

a)

The element NaCl.

b)

A compound containing an atom of sodium and an atom of chlorine.

c)

A mixture of sodium and chlorine.

d)

A dumbbell that can be used in PE.

9.

Elements on the Periodic Table are _____ and represented by a _____ .

a)

pure substances; chemical formulas

b)

pure substances; chemical symbol

c)

impure substances; chemical formulas

d)

impure substances; chemical symbols

10.

How many atoms of oxygen are found in this chemical formula?

a)

1

b)

3

c)

5

d)

6

11.

Which of the following is not an element?

a)

Helium

b)

Nitrogen

c)

Water

d)

Sodium

12.

Which of the substances listed in the image are elements?

a)

I and II, only

b)

II, III, and IV, only

c)

III and IV, only

d)

I. and III, only

13.

Potassium fluoride, KF, is---

a)

a compound of two elements

b)

a mixture of two compounds

c)

a pure atomic substance

d)

a pure chemical solution

14.

The molecule is--

a)

an atom composed of oxygen and carbon elements

b)

an element composed of oxygen and carbon atoms

c)

a compound composed of oxygen and carbon atoms

d)

a mixture composed of oxygen and carbon compounds

15.

Carbon Dioxide (CO2) is a compound with molecules that consist of one carbon atom and two oxygen atoms. Why is carbon dioxide a compound and not an element?

a)

Carbon dioxide is a gas.

b)

Carbon dioxide consists of multiple oxygen atoms.

c)

Carbon dioxide consists of oxygen atoms and carbon atoms.

16.

Which of the following best describes an element?

a)

Elements are chemicals that are pure substances held together by chemical bonds.

b)

Elements are mixtures of atoms and molecules in different combinations.

c)

Elements are chemicals that are pure substances represented by symbols that have at least one capital letter.

d)

Elements are chemicals that are formed when a temperature change happens or a precipitate forms.

17.

Which of the following is NOT a compound?

a)

FeO

b)

CO

c)

H2O2

d)

Fe

18.

A periodic table is a table that lists different __________.

a)

compounds

b)

elements

c)

atoms

d)

mixtures

19.

Elements are denoted by ________ and compounds are represented by _________.

a)

chemical symbols & chemical formulae

b)

chemical formulae & chemical symbols

20.

How many atoms are there in a molecule of Aluminium oxide Al2O3Al_2O_3 ?

a)

5

b)

3

c)

2

d)

10

21.

Which of the following metals is commonly used in making jewelry?

a)

Nitrogen

b)

Silver

c)

Potassium

d)

Zinc

22.

What are the two elements that make up the compound water?

a)

Oxygen and iron

b)

Hydrogen and nitrogen

c)

Hydrogen and oxygen

d)

Sodium and chlorine

23.

Which of the following is false about mixtures?

a)

Mixtures are always made up of two or more substances.

b)

It is easy to separate the substances in a mixture.

c)

Mixtures are always in a fixed proportion.

d)

Mixtures are never made up of elements chemically combined.

24.

Do you believe that the properties of a compound will be the same as the properties of the elements that make up the compound?

a)

Yes, absolutely!

b)

No way, that's not true!

25.

Which of the following elements behaves like a sneaky liquid at room temperature?

a)

Mercury

b)

Iron

c)

Oxygen

d)

Gold

26.

Which of the following materials is commonly used in window and door frames?

a)

Potassium

b)

Aluminium

c)

Gold

d)

Silver

27.

What do you call a substance formed by mixing two or more substances together without chemically combining them?

a)

A compound

b)

A mixture

c)

A molecule

d)

An atom

28.

Which gas is commonly used to fill party balloons?

a)

Oxygen

b)

Helium

c)

Neon

d)

Nitrogen

29.

Which gas is commonly used to fill party balloons?

a)

Oxygen

b)

Helium

c)

Neon

d)

Nitrogen

30.

Which of the following is an element?

a)

CO2

b)

CO

c)

Ne

d)

H2O

31.

What is the basic unit of an element?

a)

Compound

b)

Noble Gases

c)

Atom

d)

Metalloids

32.

Who suggested figurative symbols for atoms of elements?

a)

Dimitri Mendeleev

b)

Berzelius

c)

Antoine Lavoisier

d)

John Delton

33.

Select the latin name for the element - Sodium

a)

Natrium

b)

Calx

c)

Aurum

d)

None of these

34.

Select the latin name for the element - Lead

a)

Aurum

b)

Zinken

c)

Calx

d)

Plumbum

35.

Type the symbol for the element - Mercury

(a)  

36.

Select the symbol for the element - Silicon

a)

S

b)

Si

c)

Sa

d)

Sn

37.

Give one example where Fluorine is used.

a)

Tooth paste

b)

Swimming Pool

c)

Matchstick

d)

Utensils

38.

Type the chemical name of water

(a)  

39.

What is the symbol for Sulphate?

a)

SO2

b)

SO4

c)

So6

d)

SO8

40.
Represents the name of an element and is written as a capital or a capital letter followed by a lowercase letter.
a)
Atomic Number 
b)
Atomic Mass
c)
Chemical Symbol 
d)
Groups
41.
A pure substance made by chemically combining two or more elements.  
a)
Compounds 
b)
Element 
c)
Atoms 
d)
Subscript 
42.

A one or two letter abbreviation that represents an element

a)

Element

b)

Compound

c)

Chemical Symbol

d)

Chemical Formula

43.

How many Elements are in the Compound CaCO3

a)

1

b)

2

c)

3

d)

4

44.
Al represents the element ...
a)
Gold
b)
Aluminum
c)
Tin
d)
Arsenic
45.
Ar represents the element ...
a)
Arsenic
b)
Aluminum
c)
Argon
d)
Oxygen
46.
As represents the element ...
a)
Argon
b)
Aluminum
c)
Arsenic
d)
Fluorine
47.
Be represents the element ...
a)
Barium
b)
Boron
c)
Bismuth
d)
Beryllium
48.
B represents the element ...
a)
Boron
b)
Bismuth
c)
Beryllium
d)
Barium
49.
Br represents the element ...
a)
Boron
b)
Barium
c)
Bromine
d)
Beryllium
50.
Ca represents the element ...
a)
Copper
b)
Calcium
c)
Carbon
d)
Cerium
51.
C represents the element ...
a)
Calcium
b)
Carbon
c)
Chlorine
d)
Cesium
52.
Cl represents the element ...
a)
Carbon
b)
Calcium
c)
Chromium
d)
Chlorine
53.
Cr represents the element ...
a)
Chlorine
b)
Carbon
c)
Cesium
d)
Chromium
54.
F represents the element ...
a)
Iron
b)
Francium
c)
Fermium
d)
Fluorine
55.
Au represents the element ...
a)
Silver
b)
Tungstun
c)
Gold
d)
Indium
56.
He represents the element ...
a)
Hydrogen
b)
Copper
c)
Hellium
d)
Helium
57.
H represents the element ...
a)
Helium
b)
Hellium
c)
Hydrogen
d)
Neon
58.
I represents the element ...
a)
Iridium
b)
Iodine
c)
Lithium
d)
Sulfur
59.
Co represents the element ...
a)
Carbon
b)
Cobalt
c)
Cesium
d)
Cerium
60.
Fe represents the element ...
a)
Iron
b)
Ferium
c)
Fluorine
d)
Francium
61.
Pb represents the element ...
a)
Gold
b)
Silver
c)
Potassium
d)
Lead
62.
Mg represents the element ...
a)
Manganese
b)
Magnesium
c)
Molybdenum
d)
Mendelevium
63.
Mn represents the element ...
a)
Manganese
b)
Magnesium
c)
Mendelevium
d)
Molybdenum
64.
Ni represents the element ...
a)
Neon
b)
Nickel
c)
Nitrogen
d)
Sodium
65.
N represents the element ...
a)
Nickel
b)
Neon
c)
Nitrogen
d)
Sodium
66.
N represents the element ...
a)
Nickel
b)
Neon
c)
Nitrogen
d)
Sodium
67.
P represents the element ...
a)
Potassium
b)
Phosphorus
c)
Platinum
d)
Praseodymium
68.
K represents the element ...
a)
Potassium
b)
Krypton
c)
Californium
d)
Curium
69.
Ag represents the element ...
a)
Argon
b)
Gold
c)
Mercury
d)
Silver
70.
Na represents the element ...
a)
Nickel
b)
Sodium
c)
Niobium
d)
Neodymium
71.
W represents the element ...
a)
Tungstun
b)
Arsenic
c)
Vanadium
d)
Thorium
72.
Zn represents the element ...
a)
Zirconium
b)
Zinc
c)
Mercury
d)
Thallium
73.
Copper has the chemical symbol
a)
Cu
b)
Cl
c)
C
d)
Ag

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