Free Printable Knowledge Check: Elements, Compounds, and Mixtures

Free Printable Worksheets

Worksheets

Knowledge Check: Elements, Compounds, and Mixtures

Total questions: 20

Worksheet time: 16mins

Name

Class

Date

1.

How many total atoms are in this compound? ? (Type as a number, not a word.)

$NH_3$ = (a)

2.

Particles that are together physically but not chemically combined are called (a) .

3.

Select all of the elements in these answer choices. (There may be more than 1)

a)

O₂

b)

CO₂

c)

Co

d)

CO

e)

C₆₀

4.

Select all of the compounds in these answer choices. (click all that apply)

a)

H₂S

b)

C₆H₁₂O₆

c)

O₂

d)

CO

e)

Co

5.

Match the following

a)

1.

pure element

b)

2.

pure compound

c)

3.

mixture of elements

d)

4.

mixture of compounds

e)

5.

mixture of elements and compounds

6.

Select all of the compounds in these particle diagrams. (check all that apply)

a)

b)

c)

d)

e)

7.

Match the term with its definition

a)

a pure substance that consists of only one type of atom

1.

element

b)

a pure substance that consists of different types of atoms chemically joined together

2.

compound

c)

contains two or more different substances physically joined together

3.

mixture

8.

How many elements are in C₆H₁₂O₆? (Type as a number, not a word.)

(a)

9.

Match the following

a)

1.

element

b)

2.

compound

c)

3.

mixture of 2 elements

d)

4.

mixture of 2 compounds

10.

How many atoms of Sodium (Na) are in $6NaCl$ ? (Type as a number, not a word.)

(a)

11.

An element is a ____ that cannot be separated into simpler substances by physical or chemical means.

a)

pure substance

b)

solution

c)

mixture

d)

compound

12.

How many molecules of methane are there? ? (Type as a number, not a word.)

(a)

13.

___ is a pure substance containing two or more different kinds of atoms.

a)

element

b)

mixture

c)

compound

d)

solution

14.

Which of the following is a pure substance? (check all that apply)

a)

O₂

b)

Al₂CO₅

c)

C₆H₁₂O₆

d)

SiO₂

15.

All matter is made of ____.

a)

energy

b)

atoms

c)

air

d)

chemistry

16.

Which chemical formula below matches the image shown here?

a)

$2H_2O$

b)

$H_2O_2$

c)

$4H2O$

d)

$2HO$

17.

Match the following

a)

1.

H₂O₄

b)

2.

H₂O₂

c)

3.

CH₄

d)

4.

C₂H₄

e)

5.

2H₂O

18.

Which of the models best represents CaCO₃?

a)

b)

c)

d)

19.

Which chemical formula below matches the image shown here?

a)

$2H_2O$

b)

$H_4O_2$

c)

$4H2O$

d)

$2HO$

20.

Using the wooden atom models, build the molecule that Ms. S assigned to you and draw it here. Do it like we did in our lab, using the correct color for each element, the element symbol written inside each "atom," and a straight line to represent a bond.

100 %

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