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Worksheets

Atoms, Elements, Molecules, & Compounds

Total questions: 55

Worksheet time: 37mins

Name
Class
Date
1.

What is the relationship between molecules and atoms?

a)

Molecules are combinations of two or more atoms.

b)

Molecules are the parts that make up atoms

c)

Molecules are the gaseous parts of atoms

d)

Molecules are atoms that have a positive charge

2.
What is the name of a single type of atom?
a)
cell
b)
proton
c)
element
d)
atom
3.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
4.

What is a small particle that is known as the basic building block of matter?

a)

molecule

b)

compound

c)

element

d)

atom

5.

Two oxygen atoms bond (connect) together, which word best describes this type of matter?

a)

molecule

b)

compound

c)

element

d)

atom

6.

H2O can be described as which TWO of the following...

a)

molecule

b)

compound

c)

element

d)

atom

7.

Which of the following is the most accurate statement?

a)

everything is both a molecule and a compound

b)

nothing can be both a molecule and a compound

c)

all compounds are also molecules

d)

All molecules are also compounds

8.

Which words can be used to describe this image? (check all that apply)

a)

molecule

b)

compound

c)

element

d)

atom

9.

Which one of the following is a compound?

a)

NaCl

b)

O2

c)

Hydrogen

d)

He2

10.

Molecules and compounds are created when multiple atoms bond together, but how are they different?

a)

Compounds have to have atoms from different elements bonded together

b)

Molecules have to have atoms from different elements bonded together

c)

They are the same and there is no difference

d)

Molecules are building blocks of compounds

11.

Which of these models can be described as a compound?

a)

water

b)

carbon dioxide

c)

amonia

d)

methane

e)

All of them are compounds

12.

Which of these is only a molecule and not a compound?

a)

a

b)

b

c)

c

d)

d

13.

Which of the following is different from the rest of the group? (choose the answer that best applies)


Nitrous Oxide (N₂O)

Ozone (O₃)

Carbon Dioxide (CO₂)

Dihydrogen Monoxide (H₂O)

a)

Ozone (O₃)

b)

Nitrous Oxide (N₂O)

c)

Carbon Dioxide (CO₂)

d)

Dihydrogen Monoxide (H₂O)

14.
Elements are made of 
a)
many types of atoms 
b)
the periodic table
c)
one type of atom 
d)
molecules 
15.

Atom or Molecule?

a)

Atom

b)

Molecule

16.

Atom or Molecule?

a)

Atom

b)

Molecule

17.

Atom or Molecule?

a)

Atom

b)

Molecule

18.

Element or Compound?

a)

Element

b)

Compound

19.

Element or Compound?

a)

Element

b)

Compound

20.

Element or Compound?

a)

Element

b)

Compound

21.

Element or Compound?

a)

Element

b)

Compound?

22.

Select the correct answer.

a)

Element

b)

Compound

c)

Mixture

23.

Select the correct option.

a)

Element

b)

Compound

c)

Mixture

24.

Select the correct answer.

a)

Element

b)

Compound

c)

Mixture

25.

Hg is an example of a(n) _________

(Select all that apply)

a)

Element

b)

Compound

c)

Molecule

26.

CO is an example of a(n) _________

(Select all that apply)

a)

Element

b)

Compound

c)

Molecule

27.

H2O is an example of a(n) _________

(Select all that apply)

a)

Element

b)

Compound

c)

Molecule

28.

Cl2 is an example of a(n) _________

(Select all that apply)

a)

Element

b)

Compound

c)

Molecule

29.

Fe is an example of a(n) _________

(Select all that apply)

a)

Element

b)

Compound

c)

Molecule

30.

How many elements are in this chemical formula?

HCl

a)

1

b)

2

c)

3

d)

4

31.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
32.

How many elements are there?

a)
1
b)
2
c)
3
d)
4
33.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
34.

A capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

a)

Chemical symbol

b)

Element sign

c)

Atomic Number

d)

Atomic Mass

35.

How many elements are in this chemical formula: Zn(NO3)2

a)

3

b)

7

c)

5

d)

12

36.

How many elements?

a)

2

b)

3

c)

4

d)

5

37.

How many elements?

a)

4

b)

5

c)

6

d)

7

38.

How do you know when there is a different element?

a)

Capital letter

b)

lower case letter

c)

subscripts

d)

coefficients

39.
a)

2 hydrogens and 2 oxygens

b)

2 hydrogens, 1 oxygen

c)

3hydrogens

d)

4 hydrogens

40.

the pink circled molecule

a)

3 hydrogen, 1 nitrogen

b)

3 nitrogen, 1 hydrogen

c)

4 nitrogen

d)

4 hydrogen

41.
Black = Carbon (C)
White = Hydrogen (H)
What would be the formula for ethane?
a)
CH4
b)
CH6
c)
C2H2
d)
C2H6
42.

Is this an element or a compound?  CaSO4CaSO_4  

a)

Element

b)

Compound

43.

Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?

a)

niF2

b)

NIF2

c)

Ni1F2

d)

NiF2

44.
Which of the following atomic symbols is written correctly?
a)
ee
b)
hE
c)
C
d)
CL
45.
Which statement best describes an element?
a)
made from mixture 
b)
thousands in the world
c)
pure, made of only one atom
d)
can be separated 
46.
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.
47.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
48.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
49.
Are these molecules also compounds?
a)
YES
b)
NO
50.

Carbon

a)

C

b)

Ca

c)

Cu

d)

Cr

51.

Sodium

a)

Ne

b)

S

c)

Na

d)

Mg

52.

Sulfur

a)

S

b)

Sn

c)

Na

d)

Sr

53.

Pb

a)

Plutonium

b)

Lead

c)

Platinum

d)

Radon

54.
Ca is the chemical symbol for which element? 
a)
Carbon
b)
Chlorine
c)
Calcium
55.
Fe is the chemical symbol for which element? 
a)
Freon
b)
Iron
c)
Flourine

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