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Elements Molecules and Mixture Quiz-2024

Total questions: 49

Worksheet time: 28mins

Name
Class
Date
1.
a)
3
b)
12
c)
24
d)
6
2.
a)
element
b)
solution
c)
compound
d)
atom
3.
a)
carbon
b)
hydrogen
c)
nitrogen
d)
oxygen
4.
a)
elements
b)
solution
c)
compound
5.
a)
2
b)
3
c)
4
6.
What is the chemical formula for Ammonia, pictured below?
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
7.
a)
6
b)
24
c)
12
8.
Which of the following is a characteristic of a molecule?
a)
Consists of only one kind of atom
b)
Can be broken down by chemical means
c)
Consists of two or more atoms chemically bound together
d)
Has properties identical to its components
9.
a)
6
b)
24
c)
12
10.
a)
4
b)
5
c)
6
d)
7
11.
a)
number of inches of snow
b)
number of days with snow
c)
1 day
d)
1 inch of snow
12.
a)
20cm
b)
30cm
c)
40cm
d)
50cm
13.
a)
How many atoms of the element are in the molecule
b)
How many elements are in the molecule
c)
How many molecules of the compound are present
14.
How many elements in the following compound:
a)
2
b)
3
c)
4
d)
9
15.
What is a substance that forms when two or more elements combine chemically?
a)
element
b)
mixture
c)
atom
d)
compound
16.
Use the data table below to answer the following question: How many elements are present in water (H₂O)?
a)
3
b)
2
c)
1
17.
Which compound contains three elements?
a)
Water (H₂O)
b)
Glucose (C₆H₁₂O₆)
c)
Oxygen (O₂) and Iron (Fe)
18.
Which of the following is a compound?
a)
oxygen O
b)
Water (H₂O)
c)
carbon C
d)
hydrogen H
19.
How many elements are present in the compound: CH₂O
a)
2
b)
3
c)
4
d)
7
20.
How many atoms of Hydrogen are present in the compound: CH₂O
a)
2
b)
3
c)
4
d)
7
21.
How many atoms of Carbon (C) are present in the compound: C₂H₂
a)
2
b)
3
c)
4
d)
7
22.
What elements are present in this caffeine compound: C₈H₁₀N₄O₂
a)
Calcium, Hydrogen, Neon, & Oxygen
b)
Carbon, Hydrogen, Nitrogen & Oxygen
c)
Cobalt, Helium, Nickel & Osmium
23.
Choose the chemical formula for this molecule
a)
CH₄
b)
CO₂
c)
CO
d)
C₂O
24.
Natural gas is mainly methane (CH₄). What two elements are found in methane
a)
Carbon and oxygen
b)
Magnesium and oxygen
c)
Magnesium and hydrogen
d)
Carbon and hydrogen
25.
Each circle represents an atom and each color represents a different kind of atom. Using the images below, identify the images that contain only MIXTURES.
a)
4,5 and 8
b)
7 and 8
c)
4 and 8
d)
7
26.
Each circle represents an atom and each color represents a different kind of atom. Using the images below, identify the boxes that contain only COMPOUNDS.
a)
9,11, 12
b)
9 and 10
c)
11 and 12
27.
Each circle represents an atom and each color represents a different kind of atom. Using the picture below, identify the boxes that contain only ELEMENTS.
a)
1,2,5
b)
1, 2, 5
c)
2 and 5
d)
1 and 4
28.
Which group of elements on the periodic table do not easily bond with other elements to form compounds?
a)
Metals
b)
The Noble Gases
c)
Halogens
29.
A molecule of the compound nitrogen dioxide consists of one nitrogen atom (N) and two oxygen atoms (O). What is the chemical formula for this compound?
a)
NO₂
b)
N₂O
c)
NO
d)
2NO
30.
Hydrochloric acid or hydrogen Chloride contains 1 Hydrogen atom and 1 Chlorine atom, What is the chemical formula for hydrochloric acid?
a)
HCl
b)
H₂Cl
c)
HCl₂
31.
The small number placed to the lower right of a chemical symbol gives the following information:
a)
number of atoms of that element in the compound
b)
number of elements in the compound
c)
atomic number of the element
d)
number of compounds in an element
32.
One molecule of H₂SO₄ contains:
a)
2 helium atoms, 1 sulfur atom, and 4 oxygen atoms
b)
2 hydrogen atoms, 4 sulfur atoms and 4 oxygen atoms
c)
2 hydrogen atoms, 1 sulfur atom and 4 oxygen atoms
33.
Ozone (O₃) is an example of a(n) _________
a)
atom
b)
compound
c)
molecule
d)
compound and molecule
34.
Identify the substances below as molecules or compounds?
a)
atom
b)
compound
c)
molecule
d)
compound and molecule
35.

The subscript 2 in H2O tells us

a)

There are 2 atoms of oxygen in one molecule of water

b)

There are 2 atoms of hydrogen in one molecule of water

c)

There are 2 molecules of water present

d)

The 2 tells me nothing, you wizard!

36.

Which of the following are examples of Compounds?

a)

Salt

b)

Salt Water

c)

N2 + O2

d)

C6H12O6

e)

Co

37.

Which of the following are examples of ELEMENTS?

a)

Oxygen

b)

Water

c)

F2

d)

Lemonade

e)

Sulfur Dioxide (SO2)

38.

Compounds

a)

are made of two or more types of atoms chemically bonded together

b)

are made of one type of atom

c)

are found on the periodic table

d)

can be separated into their individual parts through physical means

39.

Propane is a....

a)

Element

b)

Compound

c)

Mixture

40.
Are these molecules also compounds?
a)
YES
b)
NO
41.
Are these molecules also compounds?
a)
YES
b)
NO
42.

In this diagram, X represents...

a)

A compound

b)

A mixture

c)

An atom

d)

An element

43.

In this diagram, Y represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture

44.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
45.

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?

a)

aluminum and iron

b)

iron and sodium chloride

c)

carbon dioxide and aluminum

d)

sodium chloride and carbon dioxide

46.

Lemonade consists of several substances that are NOT chemically combined, so lemonade is classified as

a)

pure substance

b)

a compound

c)

a mixture

d)

an element

47.

What is the chemical formula for a compound consisting of two hydrogen atoms and one oxygen atom?

a)

H2O2

b)

O2H

c)

HO2

d)

H2O

48.

Which of the following is an example of a mixture?

a)

Carbon Dioxide (CO2)

b)

Air

c)

Salt (NaCl)

d)

Water (H2O)

49.

How many oxygen atoms are present in the compound CO2?

a)

4

b)

1

c)

2

d)

3

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