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Atoms, Elements, and Compounds

Total questions: 40

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

The smallest part of an element.....

a)

Mixture

b)

Compound

c)

Molecule

d)

atom

2.

All matter can be either a pure substance or ______.

a)

an atom

b)

a mixture

c)

an element

d)

changing

3.

The following picture is a model of a ________.

a)

Mixture

b)

Compound

c)

Molecule

d)

Element

4.
A combination of different substances that remain the same individual substances and these individual substances can be easily separated is a what?
a)
mixture
b)
compound
c)
molecule
d)
element
5.

Gold (Au) is an example of a (n)________.

a)

element

b)

compound

c)

mixture

d)

molecule

6.
Can an element be broken  down into a simpler substance by ordinary chemical or physical means?
a)
Yes
b)
No
7.
The parts of a compound can be separated by _________ means.
a)
any
b)
no
c)
chemical
d)
physical
8.

An example of a pure substance is ______.

a)

pepperoni pizza

b)

dirt

c)

blood

d)

distilled water (H2O)

9.

An example of a compound would be......

a)

H20

b)

N

c)

O2

d)

Ar

10.

The following picture is a picture of a (n) ______.

a)

mixture of elements

b)

element

c)

mixture of compounds

d)

compound

11.
Hydrogen, Calcium, and Boron are examples of _________.
a)
Mixtures
b)
Compounds
c)
Molecules
d)
Elements
12.

A substance that is made of two or more different types of atoms chemically bonded together is a ________.

a)

mixture

b)

compound

c)

molecule

d)

element

13.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
14.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
15.

Which of the following is not a compound?

a)

HCl

b)

Cl

c)

NaCl

d)

CO2

16.

Which of the following represents a molecule of an element?

a)

H2O

b)

H2

c)

NaCl

d)

CaCO3

17.
The basic unit of matter is
a)
a mixture
b)
a substance
c)
an atom
d)
a compound
18.
Which of the following is not a compound?
a)
HCl
b)
Cl2
c)
NaCl
d)
CO2
19.

How many different elements make up N2O?

a)

1

b)

2

c)

3

d)

4

20.

How many total atoms are found in CO2?

a)

3

b)

5

c)

6

d)

9

21.

Chemical symbols represent....

a)

elements

b)

mixtures

c)

compounds

22.

Which of the following can be found on the periodic table?

a)

elements

b)

compounds

c)

mixtures

23.

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

a)

a gas at room temperature.

b)

made of two different elements.

c)

given off by green plants.

d)

useful to human beings

24.

A section of the Periodic Table is shown. What is the Chemical Symbol for Magnesium?

a)

12

b)

Magnesium

c)

24.31

d)

Mg

25.

Compounds are different than elements because compounds are ---

a)

combinations of two or more elements.

b)

not able to be broken down into parts.

c)

made from the same type of atoms.

d)

a pure substance; elements are not.

26.

The smallest particle of any particular type of matter is known by which of the following terms?

a)

Element

b)

Chemical

c)

Atom

d)

Compound

27.
Is water an element or a compound?
a)
Element
b)
Compound
28.
A compound consists of two or more elements bound together.
a)
True
b)
False
29.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
30.

Both elements and compounds are pure substances.

a)

Agree

b)

Disagree

31.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
32.

The positive particles of an atom are

a)

electrons

b)

positrons

c)

neutrons

d)

protons

33.
Neutrons are _______________ particles.
a)
negative
b)
positive
c)
neutral
d)
cows
34.

What does a molecule with all the SAME type of atoms represent?

a)

cell

b)

proton

c)

element

d)

atom

35.

What is the term for combining 2 or more DIFFERENT atoms together?

a)

atoms

b)

elements

c)

molecules

d)

compounds

36.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
37.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
38.
The particles that are found in the nucleus of an atom are _____.
a)
Neutrons and electrons
b)
Electrons only
c)
Protons and neutrons
d)
Protons and electrons
39.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
40.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above

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