Free Printable Counting Atoms / Elements Compounds, and Mixtures

1.

What does the subscript in a chemical formula tell you?

a)

How many molecules are present

b)

How many atoms are present

c)

How many elements are present

d)

How many neutrons are present

2.

How many elements are in this chemical formula?

HCl

a)

1

b)

2

c)

3

d)

4

3.

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

a)

6

b)

1

c)

12

4.

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

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

5.

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

a)

2

b)

4

c)

3

6.

How many more atoms of Oxygen than than Magnesium are in this formula? $MgSO_4$

a)

4

b)

3

c)

2

d)

6

7.

Which of the following is a molecule of a compound?

a)

$H_2$

b)

$Cl_2$

c)

$H_2O$

d)

$F_2$

8.

Which does not belong in the group?

a)

Sodium

b)

Glucose

c)

carbon

d)

Element

9.

What is the symbol for potassium?

a)

Ka

b)

Po

c)

PA

d)

K

10.

What is the symbol for sodium?

a)

Na

b)

So

c)

Sd

d)

Nd

11.

What is a compound made of?

a)

songs

b)

cages

c)

molecules, Elements, atoms

d)

words

12.

How was the first periodic table arranged?

a)

Atomic Number

b)

Atomic mass

c)

Alphabetically

d)

Net worth

13.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

14.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

15.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

16.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

17.

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

a)

element symbol; atoms

b)

atom; element symbol

c)

subscript; protons

d)

compound; elements

18.

What is a coefficient?

a)

The small number on the right of the chemical symbol.

b)

The large number to the left of a formula.

19.

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

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

20.

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

a)

niF2

b)

NIF₂

c)

Ni₁F₂

d)

NiF₂

21.

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

a)

18

b)

12

c)

25

d)

24

22.

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

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

23.

Molecules that are made of more than one type of atom are called?

a)

Molecules

b)

Elements

c)

Mixtures

d)

Compounds

24.

How many O's are in Al₂(SO₄)₃

a)

4

b)

12

c)

7

d)

24

25.

Number of N in (NH₄)₂CrO₄

a)

1

b)

2

c)

8

d)

16

26.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

27.

How many atoms of Oxygen are in Fe(NO₃)₃ ?

a)

6

b)

3

c)

9

d)

1

28.

The red numbers in the image below represent ________

a)

subscripts

b)

coefficients

c)

I don't know, and don't want to try

d)

None of the answers are correct

29.

Elements are made of

a)

Many types of atoms

b)

the Periodic Table

c)

One type of atom

d)

Molecules

30.

Molecules are

a)

2 atoms joined together

b)

2 elements joined together

c)

2 or more atoms mixed together

d)

2 or more atoms (same or different) joined together

31.

The smallest particle that makes everything

a)

atom

b)

element

c)

compound

d)

mixture

32.

All ____________ are made up of two or more atoms bonded together.

a)

atoms

b)

molecules

c)

electrons

d)

elements

33.

What is gold?

a)

element

b)

compound

c)

mixture

34.

What is krypton?

a)

element

b)

compound

c)

mixture

35.

What is water (H₂O)?

a)

element

b)

compound

c)

mixture

36.

Which one can be found on the periodic table?

a)

Compound

b)

Element

37.

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

a)

atoms

b)

elements

c)

molecules

d)

compounds

38.

TRUE OR FALSE:
Every compound is a molecule but not every molecule is a compound.

a)

TRUE

b)

FALSE

39.

This picture represents which of the following?

a)

element

b)

compound

c)

mixture

40.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

41.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

42.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

43.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

44.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

45.

Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)

a)

H₃SO₄

b)

HSO₄

c)

H₄S₃O

d)

H₂O

46.

How many Elements are in the compound C₂H₈O ?

a)

2

b)

1

c)

3

d)

0

47.

How many atoms of Hydrogen are in this compound

a)

1

b)

2

c)

3

d)

4

48.

How many atoms are in the element Carbon in this compound?
H₂C₃O₄N₅

a)

2

b)

3

c)

4

d)

5

49.

In this compound structure of alcohol, how many Hydrogen atoms are there?

a)

2

b)

4

c)

6

d)

8

50.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

51.

Classify the picture with the correct label.

a)

Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

52.

Classify the picture with the correct label.

a)

Element

b)

Compound

c)

Mixture of Elements and Compounds

d)

Mixture of Elements

53.

Classify the picture with the correct label.

a)

Compounds

b)

Mixture of Elements

c)

Mixture of Compounds

d)

Mixture of Elements & Compounds

54.

Classify the picture with the correct label.

a)

Element

b)

Compound

c)

Mixture of Compounds

d)

Mixture of Elements

55.

Classify the picture with the correct label.

a)

Element

b)

Compound

c)

Mixture of Elements & Compounds

d)

Mixture of Elements

56.

Classify the picture with the correct label.

a)

Mixture of Elements

b)

Mixture of Elements & Compounds

c)

Mixture of Compounds

d)

Compounds

57.

Classify the picture with the correct label.

a)

Mixture of Elements

b)

Mixture of Elements & Compounds

c)

Mixture of Compounds

d)

Compounds

58.

which one only has one type of atom In it.

a)

Element

b)

compound

59.

Which one has more than one type of atom in it

a)

Element

b)

Compound

60.

Compounds are chemically bonded together

a)

False

b)

True

c)

I don't know?

Counting Atoms / Elements Compounds, and Mixtures

Total questions: 60

Worksheet time: 31mins

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