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Atom, Element, Molecule or Compound?

Total questions: 35

Worksheet time: 21mins

Name
Class
Date
1.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
2.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
3.
What is the picture displayed?
a)
Atom
b)
Element
c)
Molecule
d)
Compound
4.
What is the picture displayed?
a)
atom
b)
element
c)

molecule formula

d)
compound
5.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
6.

Is H an element or a molecule?

a)

element

b)

molecule

7.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
8.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
9.

A substance that cannot be broken down into a simpler substance by chemical methods.

a)

chemical

b)

element

c)

compound

d)

mixture

10.

How many atoms of Oxygen are in O2?

a)

1

b)

2

c)

3

d)

4

11.

How many atoms are in NH3?

a)

2

b)

3

c)

4

d)

5

12.
Elements are made of 
a)
many types of atoms 
b)
the periodic table
c)
one type of atom 
d)
molecules 
13.
Two or more atoms chemically bonded together are called a
a)
atom
b)
element
c)
molecule
d)
mixture
14.

Which colored particle is the electron?

a)

blue

b)

red

c)

yellow

d)

red and yellow

15.

How many hydrogens in this molecule?

a)

1

b)

2

c)

3

16.

How many Oxygen atoms are in Water (H2O)

a)
1
b)
2
c)
3
d)
4
17.

O2 is a molecule.

a)

TRUE

b)

FALSE

18.

Element or compound?

a)

element

b)

compound

19.

What is this?

a)

Element

b)

Electron

c)

Atom

d)

Molecule

20.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
21.

How many carbon atoms are in 2C6H12O6?

a)

6

b)

3

c)

24

d)

12

22.
How many hydrogen atoms are there in a water molecule? 
a)
0
b)
1
c)
2
d)
3
23.

Which term below best matches this picture?

a)

atom

b)

element

c)

compound

24.
NaCl
a)

Atom

b)

Element

c)

Compound

25.

How many Carbons "C" are in C18H34O3

a)

18

b)

34

c)

3

d)

37

26.
In Cl2, the 2 is known as
a)
the subscript.
b)
the coefficient.
c)
the molecular mass.
d)
the number of protons.
27.

What element is NOT in C18H34O3

a)

Carbon

b)

Calcium

c)

Hydrogen

d)

Oxygen

28.

Which of the following are examples of ELEMENTS?

a)

Oxygen

b)

Water

c)

F2

d)

Sulfur Dioxide (SO2)

29.

Which of the following are examples of Compounds?

a)

Salt

b)

Salt Water

c)

C6H12O6

d)

Co

30.

What is the difference between an atom and a molecule?

a)

Molecules are groups of atoms held together physically

b)

Molecules are groups of atoms held together chemically

c)

Molecules are mixtures

d)

Molecules are only found in the gas state of matter, while atoms can form solids, liquids, and gasses

31.

Ozone (O3) is found in the atmosphere. Ozone is an example of a(n)

a)

element

b)

compound

c)

mixture

d)

atom

32.

This picture represents which of the following?

a)

molecules

b)

compounds

33.

What does the diagram show?

a)

two elements

b)

A pure compound

c)

two compounds

d)

both compounds & elements

34.

What does the diagram show?

a)

A mixture of two different elements

b)

A pure compound

c)

A mixture of two different compounds

d)

A mixture of a compound & an element

35.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element

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