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Chemistry Review

Total questions: 65

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

Identify the element with 79 protons.

a)

Gold

b)

Bromine

c)

Mercury

d)

Selenium

2.

Identify the element with 4 valence electrons and the least mass.

a)

Carbon

b)

Silicon

c)

Titanium

d)

Zirconium

3.

Identify the metalloid in period 3 with more protons than sodium and fewer valence electrons than chlorine.

a)

Silicon

b)

Aluminum

c)

Germanium

d)

Arsenic

4.

Identify the metal in period 3 that is more reactive than magnesium.

a)

Sodium

b)

Aluminum

c)

Potassium

d)

Lithium

5.

Identify the nonmetal in period 4 that is more reactive than selenium.

a)

Bromine

b)

Krypton

c)

Chlorine

d)

Iodine

6.

Identify the nonmetal in period 3 that is less reactive than sulfur

a)

Phosphorus

b)

Chlorine

c)

Argon

d)

Silicon

7.

Identify the element with 47 protons

a)

Silver

b)

Titanium

c)

Gold

d)

Copper

8.

Identify the element in period 5, group 17.

a)

Iodine

b)

Astatine

c)

Bromine

d)

Xenon

9.

Identify the element with 5 valence electrons in period 4.

a)

Arsenic

b)

Antimony

c)

Vanadium

d)

Dubnium

10.

Identify the element with 3 energy levels and 2 valence electrons.

a)

Magnesium

b)

Calcium

c)

Strontium

d)

Barium

11.

Identify the element with 5 neutrons

a)

Beryllium

b)

Boron

c)

Lithium

d)

Carbon

12.

Identify the element that is more reactive than sulfur and has one less proton than argon.

a)

Chlorine

b)

Fluorine

c)

Bromine

d)

Phosphorus

13.

Identify the element that is non-reactive with 4 energy levels

a)

Krypton

b)

Xenon

c)

Neon

d)

Argon

14.

Identify a nonmetal with 1 valence electron

a)

Hydrogen

b)

Helium

c)

Lithium

d)

Potassium

15.

Identify the non-metal in period 2 that is more reactive than nitrogen and less reactive than fluorine.

a)

Oxygen

b)

Sulfur

c)

Nitrogen

d)

Carbon

16.

Identify the least reactive metal in period 3.

a)

Aluminum

b)

Magnesium

c)

Sodium

17.

Identify the metalloid in group 13

a)

Boron

b)

Alumninum

c)

Germanium

d)

Silicon

18.

Identify the noble gas with 2 valence electrons

a)

Helium

b)

Neon

c)

Argon

d)

Krypton

19.

Identify the metal in the 4th period that is more reactive than Calcium

a)

Potassium

b)

Gallium

c)

Zinc

d)

Scandium

20.

Identify a metalloid with 5 valence electrons

a)

Arsenic

b)

Antimony

c)

Phosphorus

d)

Bismuth

21.

Identify the element that has 6 valence electrons and 3 energy levels

a)

Selenium

b)

Sulfur

c)

Oxygen

d)

Tellurium

22.

Identify the element that has 5 valence electrons and 2 energy levels

a)

Nitrogen

b)

Phosphorus

c)

Arsenic

d)

Antimony

23.

Identify the Lanthanide with the least mass

a)

Lanthanum

b)

Cerium

c)

Barium

d)

Cesium

24.

Identify the element that has more valence electrons than fluorine and fewer energy levels than Sodium

a)

Neon

b)

Helium

c)

Argon

d)

Sodium

25.

Identify the element

a)

Aluminum

b)

Lithium

c)

Silicon

d)

Gallium

26.

Identify the element

a)

Lithium

b)

Beryllium

c)

Hydrogen

d)

Nitrogen

27.

Is this element classified as a metal, nonmetal or metalloid?

a)

Metal

b)

Nonmetal

c)

Metalloid

28.

How many valence electrons does this atom have?

a)

15

b)

16

c)

5

d)

8

29.

What period is this element in?

a)

5

b)

6

c)

3

d)

2

30.

What group number is this element in?

a)

5

b)

7

c)

15

d)

14

31.

What other 2 elements have similar chemical properties to the element pictured.

a)

Sulfur, Tellurium

b)

Sulfur, Phosphorus

c)

Selenium, Antimony

d)

Polonium, Astatine

32.

What is the formula used to calculate the number of neutrons in an atom?

a)

M - A = N

b)

M = A + N

c)

P + E = N

d)

P = E = N

33.

Physical or Chemical: Chewing Food?

a)

Physical Change

b)

Chemical Change

c)

Both

34.

Physical or Chemical: Candle wax melting?

a)

Chemical Change

b)

Physical Change

c)

Both

35.

Physical or Chemical: Baking a cake?

a)

Physical

b)

Chemical

c)

Both

36.

Physical or Chemical: Matchstick burning?

a)

Physical Change

b)

Chemical Change

c)

Both

37.

Physical or Chemical: Rotting banana?

a)

Physical Change

b)

Chemical Change

c)

Both

38.

How many elements are found in the chemical formula above?

a)

3

b)

7

c)

2

d)

6

39.

How many elements are found in the chemical formula above?

a)

3

b)

4

c)

2

d)

5

40.

How many atoms of carbon are present in the chemical formula above?

a)

2

b)

3

c)

4

d)

10

41.

How many atoms of hydrogen are present in the chemical formula?

a)

6

b)

3

c)

4

d)

5

42.

Two or more elements that have been chemically combined is called a _________

a)

molecule

b)

compound

c)

formula

43.

Which of the following compounds is calcium oxide?

a)

MgO

b)

CO2

c)

CaO

d)

C6H5Na3O7

44.

Jose leaves his skateboard outside for several days. When he goes to ride it, he notices there is a brownish-red colored material that rubs off on his fingers. His mother tell him that the brownish-red material is rust, or iron oxide (Fe2O3). Iron oxide forms when iron (Fe) is exposed to oxygen (O2). Which chemical equation represents this chemical reaction?

a)

4 Fe + 3 O2 --> 2 Fe2O3

b)

2 Fe2O3 --> 4 Fe + 3 O2

c)

Fe + O2 --> Fe2O3

d)

Fe2O3 --> Fe + O2

45.

What is the term for the number 2 in the chemical formula, 3FeCl2?

a)

Subscript

b)

Yeilds

c)

Coefficient

46.

What is the term for the number 3 in the chemical formula, 3FeCl2?

a)

Coefficient

b)

Subsrcipt

c)

Yields

47.

All of the following are examples of elements except:

a)

Cu

b)

Cl

c)

KI

d)

He

48.

All of the following are examples of a chemical compound except:

a)

MgO

b)

O2

c)

H2O

d)

HCl

49.

A chemical formula shows all of the following except:

a)

the chemical symbols of elements

b)

the number of atoms of each element

c)

the elements found in a compound

d)

the number of protons in a nucleus

50.

What is the appropriate subscript for oxygen in the model below?

a)

6

b)

5

c)

3

d)

4

51.

Which of the following is evidence that a chemical reaciton is occuring?

a)

expected color change

b)

change in odor

c)

temperature remains constant

d)

substance changes from a solid to a liquid

52.

A child puts baking soda in a balloon and vinegar in an empty bottle. After he stretches the opening of the balloon over the opening of the bottle, he raises the balloon to dump the baking soda into the bottle. He immediately observes bubbles in the bottle and the balloon begins to expand. The student concluded that -

a)

only a physical change was occurring

b)

the bubbles indicate that a chemical change was occurring

c)

the baking soda & vinegar were products of a chemical reaction

d)

the gas was oxygen

53.

One of the reactions involved in obtaining pure copper (Cu) from copper-containing rock is: Cu2S + O2 --> 2Cu + SO2 Which of the following best describes the reaction?

a)

copper atoms are used to produce more copper atoms

b)

compounds change phase from liquid to gas

c)

atoms of other elements are turned into copper atoms

d)

elements are rearranged into new substances

54.

This is a diagram of a molecule of ammonia. What is the chemical formula for ammonia?

a)

3NH

b)

N8H3

c)

NH3

d)

2NH3

55.

Which of the following equations follows the Law of Conservation of Mass?

a)

2Na + Cl --> NaCl

b)

3H2O --> 3H2 + 3O2

c)

C2H4 + 3O2 --> 2CO2 + 2H2O

d)

C + 4H2 --> CH4

56.

In the chemical equation above, the large number in front of H2O represents -

a)

numbers divisible by the subscript

b)

the number of atoms of each element in the molecule

c)

the amount of energy in that substance

d)

the number of molecules of that substance in the reaction

57.

The water molecule shown contains -

a)

3 elements

b)

2 elements

c)

2 compounds

d)

3 molecules

58.

Which of the following set of coefficients would balance the following equation?

a)

2, 1, 1, 2

b)

1, 2, 1, 2

c)

1, 2, 2, 1

d)

2, 1, 2, 1

59.

In the equation above, what is the coefficient of the oxygen molecule?

a)

0

b)

1

c)

2

d)

4

60.

New substances formed during a chemical reaction are indicated-

a)

on the right side of the equation and are called reactants

b)

on the left side of the equation and are called products

c)

on the right side of the equation and are called products

d)

on the left side of the equation and are called reactants

61.

Carbon dioxide (CO2) is not found on the Periodic Table because carbon dioxide is -

a)

an atom

b)

a gas

c)

a mixture

d)

a compound

62.

Which of the following equations is balanced?

a)

AlBr3 + K --> KBr + Al

b)

P4 + 6Br2 --> 4PBr3

c)

2LiCl + Br2 --> LiBr + Cl2

d)

AgNO3 + 2Li --> 2LiNO3 + Ag

63.

Look at the equation above. How many atoms of oxygen are present in the reactants?

a)

6

b)

3

c)

2

d)

12

64.

How many hydrogen atoms combined to form the two water molecules

a)

4

b)

2

c)

8

d)

6

65.

Which of the following is an example of a chemical reaction?

a)

water evaporating

b)

dissolving Kool-Aid powder in water

c)

cracking an egg

d)

digesting food

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