Free Printable Atoms and molecules

1.

Elements are made of

a)

many types of atoms

b)

the periodic table

c)

one type of atom

d)

molecules

2.

Two or more atoms chemically bonded together are called a

a)

atom

b)

element

c)

molecule

d)

mixture

3.

H₂O is a compound molecule.

a)

TRUE

b)

FALSE

4.

O₂ is a compound molecule.

a)

TRUE

b)

FALSE

5.

Group of atoms bonded together

a)

Mixture

b)

Compouns

c)

Atom

d)

Molecules

6.

What is the picture displayed?

a)

atom

b)

element molecule

c)

compound molecule

7.

How many Hydrogen atoms are in Water (H2O)

a)

1

b)

2

c)

3

d)

4

8.

Are these molecules also compounds?

a)

YES

b)

NO

9.

Which of the following is NOT a compound?

a)

HCl

b)

Cl₂

c)

NaCl

d)

CO₂

10.

Which of the following represents an element molecule?

a)

H₂O

b)

H₂

c)

NaCl

d)

CaCO₃

11.

Name this compound: H₂O

a)

Water

b)

Carbon dioxide

c)

Hydrogen peroxide

d)

Sulfuric acid

12.

This picture represents which of the following?

a)

elemental molecule

b)

compound molecule

13.

Anything that has mass and takes up space is

a)

matter

b)

atoms

c)

nucleus

d)

quark

14.

The smallest particle of an element is a/an

a)

matter

b)

atom

c)

molecule

d)

electron

15.

The Greek word for atom is

a)

untouchabel

b)

unbeatable

c)

under water

d)

uncuttable

16.

Atoms are mostly

a)

energy

b)

empty space

c)

a branch of chemistry

d)

carbon

17.

A molecule

a)

Has one type of atom

b)

As two or more different atoms

c)

is an element

d)

all of the above

18.

The three states of matter you find on the periodic table are

a)

Iron gold and silver

b)

solid liquid and gas

c)

freezing melting condensation

d)

non of the above

19.

NaCl, sodium chloride, is a molecule we call

a)

sodium

b)

poison

c)

chlorine

d)

table salt

20.

What holds atoms together to make a molecule?

a)

Glue

b)

Bonds

c)

Magnetism

d)

Cement

21.

Which correctly describes the smallest amount of an element?

a)

Atom

b)

Molecule

c)

Compound

d)

Proton

22.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

23.

How would O2 be qualified. Check all answers that apply.

a)

Atom

b)

Molecule

c)

Compound

24.

What is an element?

a)

A pure substance that cannot be broken down.

b)

Two atoms bonded together.

c)

Two or more different types of atoms bonded together.

d)

An molecule with an unequal distribution of charge.

25.

What is gold?

a)

element

b)

compound

c)

mixture

26.

The beginning substances in a chemical reaction are called...

a)

reactants

b)

products

27.

Carbon dioxide (CO₂) contains how many atoms of oxygen?

a)

0

b)

1

c)

2

d)

3

28.

The short-hand notation of an element is called....

a)

formula

b)

symbol

c)

mark

d)

representation

29.

The smallest particle of a substance is......

a)

atom

b)

element

c)

molecule

d)

compound

30.

"Total mass of the products formed in chemical reaction is exactly equal to the total mass of the reactants present in it." is a .....

a)

Law of constant proportion

b)

Law of multiple proportion

c)

Law of conservation of mass

d)

All the above

31.

'S' is the symbol of ....

a)

Silicon

b)

Sulfur

c)

Sodium

d)

Above all

32.

The symbol of Gold is......

a)

G

b)

Ag

c)

Au

d)

Go

33.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

34.

How many Magnesium are in 10MgCl₂?

a)

10

b)

5

c)

20

35.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

36.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

37.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

38.

Number of N in (NH₄)₂CrO₄

a)

1

b)

2

c)

8

d)

16

39.

Number of C's in 2Na₂CO₃

a)

1

b)

2

c)

3

d)

5

40.

How many Elements are in the compound C₂H₈O ?

a)

2

b)

1

c)

3

d)

0

41.

How many total atoms are in the compound C₂H₈O ?

a)

11

b)

2

c)

8

d)

1

42.

How many Chlorine are in MgCl₂?

a)

2

b)

1

c)

3

43.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

44.

How many elements are in this chemical formula?

$H_2SO_4$

a)

1

b)

2

c)

3

d)

4

45.

How many atoms of Carbon are in this formula? $C_{6\ }H_{12}O_6$

a)

6

b)

1

c)

12

46.

What elements are represented in this chemical formula? $Fe_2O_3$

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

47.

What is the total number of atoms in this formula? $H_2O_2$

a)

2

b)

4

c)

3

48.

Which of the following elements is least likely to form a compound?

a)

Hydrogen

b)

Sodium

c)

Argon

d)

Potassium

49.

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

a)

niF2

b)

NIF₂

c)

Ni₁F₂

d)

NiF₂

50.

What is the total number of atoms in this chemical formula? $C_8H_3NaBr_{12}$

a)

18

b)

12

c)

25

d)

24

51.

Which element has the greatest number of atoms? $AgNO_3$

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

Atoms and molecules

Total questions: 51

Worksheet time: 26mins

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