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Semester Chemistry Final

Total questions: 99

Worksheet time: 3hrs 18mins

Name
Class
Date
1.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
2.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
3.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
4.
What is the atomic mass of Neon?
a)
10
b)
30
c)
10.18
d)
20.18
5.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
6.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
7.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
8.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
9.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

10.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

11.

the positively charged subatomic particle contained in the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

12.

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a)

proton

b)

neutron

c)

electron

d)

matter

13.

a negatively charged subatomic particle that orbits the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

14.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

15.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

16.

Valence electrons are found

a)

outermost energy level

b)

innermost energy level

c)

some where in the electron cloud

17.

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

a)

nothing

b)

gain 7

c)

lose 1

18.

How many valence electrons does Boron have?

a)

1

b)

2

c)

3

d)

4

19.

Group numbers on the periodic table help us determine

a)

number of valence electrons

b)

state of the element (solid, liquid, gas)

20.

In the molecule of water (H2O) - the two by the H is called the

a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
21.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
22.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
23.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
24.
Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?
a)
50 g
b)
100 g
c)
200 g
d)
400 g
25.

How many total atoms do you have in the compound 2MgCl2?

a)

2 atoms

b)

4 atoms

c)

6 atoms

d)

8 atoms

26.

How many Ca (Calcium) atoms are found in Ca(OH)2?

a)

5 atoms

b)

3 atoms

c)

2 atoms

d)

1 atom

27.

How many total atoms do you have in the chemical formula 2Mg(ClO3)2?

a)

2 atoms

b)

7 atoms

c)

9 atoms

d)

18 atoms

28.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
29.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
30.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
a)
10
b)
20
c)
30
31.
What subatomic particle(s) would be found orbiting the nucleus?
a)
Neutrons only
b)
Electrons only
c)
Protons and Neutrons
d)
Protons and Electrons
32.
Protons and Electrons balance the charge of an atom.
a)
True
b)
False
33.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
34.
If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?
a)
12 neutrons
b)
12 electrons
c)
12 protons
d)
24 protons and neutrons
35.
What subatomic particle is positively charged and is located inside of the nucleus?
a)
Proton
b)
Neutron
c)
Electron
d)
Ion
36.
Which one of these is NOT located in the element square on the Periodic Table?
a)
Atomic Number
b)
Atomic Mass
c)
Room Temperature
d)
Chemical Symbol
37.
What subatomic particle is electrically neutral (no charge)?
a)
Proton
b)
Ion
c)
Neutron
d)
Electron
38.
What is the mass of an atom if it has 11 protons, 12 neutrons, and 11 electrons?
a)
22
b)
11
c)
34
d)
23
39.
Electrons have this type of charge?
a)
negative
b)
positive
c)
neutral
40.
How many neutron are in the atom "K"?
a)
7
b)
2
c)
39
d)
20
41.

Americans drink 5,604,000 gallons of sweet tea each day. How many liters is that? (1 gal = 3.79 L)

a)

21,200,000 L

b)

21,240,000 L

c)

21,207,190.2 L

d)

21,000,000 L

42.

Convert 2.5 grams into milligrams.

a)

25 mg

b)

25,000 mg

c)

250 mg

d)

2500 mg

43.

How many minutes are in a school year, 187 days?

a)

269,280 min.

b)

16, 200 min.

c)

16, 156 min.

d)

269,000 min.

44.

A child weighs 40.0 lb and is to receive 0.10 mg of an antibiotic for each kg of body weight. How many milligrams of the antibiotic shall the child receive? (1 kg = 2.2 lbs)

a)

18.2 mg

b)

182 mg

c)

0.182 mg

d)

1.82 mg

45.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
46.

Which box has a higher density?

a)

A

b)

B

c)

They are the same

47.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
48.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
49.

A piece of copper has a mass of 89g and a volume of 10 cm3  What would be the density of the copper?

a)

0.89 g/cm3

b)

89 g/cm3

c)

8.9 g/cm3

d)

890 g/cm3

50.

An object has a volume of 6 cm3 and a mass of 42 g. What's it's density?

a)

7 g/cm3

b)

48 g/cm3

c)

42 g/cm3

d)

6 g/cm3

51.
In the picture, the mass of the block is 200 g, the dimensions of the block are 6 cm by 4 cm by 5 cm.  What is its density?
a)
1.67g/cm3
b)
13.33 g/cm3
c)
0.60 g/cm3
d)
 24000 g/cm3
52.

The amount of water displaced is the same as the volume of the object. What is the VOLUME of the object?

a)
40 mL
b)
65 mL
c)
20 mL
d)
25 mL
53.
An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?
a)
9 g/mL
b)
10.5 g/mL
c)
6.5 g/mL
d)
8 g/mL
54.
An object's volume was determined through water displacement.  The starting height of the water was 58 mL and the ending height was 65 mL.  What is the density of the object if it has a mass of 47.5 g?
a)
0.39 g/cm3
b)
6.79 g/cm3
c)
67.86 g/cm3
d)
0.15 g/cm3
55.

The density of a material is 2 g/cm3. The volume is 24 cm3 . What is the mass?

a)
12 grams
b)
48 grams
c)
12 g/cm3
d)
48 g/cm3
56.
What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?
a)
13.3 g
b)
13.3 cm3
c)
.075 g
d)
1695 cm3
57.
What is the mass of a substance with a volume of 72.5 cm3 and a density of 0.94 g/cm3?
a)
68.15 g
b)
77.13 g
c)
62 g
d)
100 g
58.

If an object has a density of 6 g/mL and you put it into water, will it sink or float?  

a)
sink
b)
float
59.

Which subatomic particle has the smallest mass?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Nucleus

60.

Which Element has 21 protons?

a)

Carbon

b)

Zinc

c)

Titanium

d)

Scandium

61.

What Element has 26 Electrons?

a)

Cobalt

b)

Iron

c)

Silicon

d)

Oxygen

62.

Based on this atomic model, what Element is this?

a)

Boron

b)

Helium

c)

Oxygen

d)

Nitrogen

63.

Based on this atomic model, how many valence electrons does this atom have?

a)

7

b)

1

c)

5

d)

4

64.

Which pair of elements would also be found in the same non-reaction group as Neon?

a)

Florine and Bromine

b)

Argon and Xenon

c)

Zinc and Mercury

d)

Lithium and Beryllium

65.

What is the name for this group of elements?

a)

Alkali

b)

Halogens

c)

Noble Gases

d)

Alkali-Earth

66.

A period on the Periodic Table is best represented by a -

a)

Vertical Line

b)

Diagonal Line

c)

Backwards Line

d)

Horizontal Line

67.

Which Element has properties similar to Arsenic?

a)

Antimony

b)

Selenium

c)

Germanium

d)

Helium

68.

In the formula 5C6H12O6, how many molecules are present?

a)

5

b)

6

c)

24

d)

12

69.

In the formula 5C6H12O6, how many different Elements are present?

a)

5

b)

6

c)

3

d)

12

70.

In the formula 5C6H12O6, how many Carbon atoms are present?

a)

5

b)

6

c)

3

d)

30

71.

In the formula 2C6H12O6, how many Hydrogen atoms are present?

a)

5

b)

24

c)

3

d)

12

72.

Which is the following is a PHYSICAL reaction/change?

a)

A nail turns orange in the air

b)

The statue of liberty turns green in the air

c)

Kool-Aid mixed with water

d)

a precipitate is formed

73.

What are the reactants in this equation?

a)

CH4 and 2O2 and CO2 and 2H2O

b)

CO2 and 2H2O

c)

CH4 and 2O2

d)

The Yield Sign

74.

What are the products in this equation?

a)

CO2 and 2H2O

b)

CH4 and 2O2 and CO2 and 2H2O

c)

CH4 and 2O2

d)

The Yield Sign

75.

Metalloids are found where on the Periodic Table?

a)

On the left

b)

On the right

c)

Along the ZIGZAG stairstep

d)

In Group 18

76.

Which of the following is NOT a pure substance?

a)

Mixture

b)

Element

c)

Compound

d)

Atom

77.

Which of the following is an example of a compound?

a)

carbon

b)

water

c)

salad

d)

einsteinium

78.

Sodium (Na) and Chlorine (Cl) bond to make salt (NaCl). Which of the following is true?

a)

For each atom of sodium there is one atom of chlorine.

b)

For each atom of sodium there are two atoms of chlorine.

c)

There are two atoms of sodium for each atom of chlorine.

d)

We don't know how many Na atoms there are for each Cl atom.

79.

What does the subscript number 2 for hydrogen (H) represent in H2O?

a)

Two molecules of water

b)

Two atoms of hydrogen for each atom of oxygen

c)

Two atoms of oxygen for each atom of hydrogen

d)

All of the above

80.

Which of these is a physical change?

a)

Yarn being knitted into a sweater

b)

A forest fire

c)

Baking soda bubbling in vinegar

d)

Grass capturing energy from sunlight

81.

Where would a newly discovered element most likely be placed in the Periodic Table?

a)

Along the right

b)

Along the left

c)

At the bottom

d)

At the top

82.

Which is pictured here?

a)

Element

b)

Compound

c)

Mixture

d)

Atom

83.

Which of the following is a homogenous mixture? Choose all that apply.

a)

Water

b)

Fruit salad

c)

Lemonade

d)

Milk

84.

Which is the best indication that a chemical reaction has taken place?

a)

Bubbles are released

b)

Color changes

c)

A new substance is formed

d)

The object breaks in half

85.

If a 12-gram ice cube melts inside a sealed plastic bag, how much will the water weigh?

a)

12 grams

b)

Less than 12 grams

c)

More than 12 grams

d)

0 grams

86.

As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedures. They measured the mass of each substance before and after each reaction. The table shows their observations.

Assuming the students did not make any careless errors, what likely explains these changes in mass?

a)

Procedure 1: One of the products was a gas that escaped into the air. Procedure 2: A gas from the air reacted with one of the other reactants.

b)

Procedure 1: The reactants were liquids with different densities. Procedure 2: The reactants were combined into only one product.

c)

Procedure 1: One of the reactants was converted to thermal energy. Procedure 2: All the products were liquids.

d)

Procedure 1: All the reactants were liquids that evaporated. Procedure 2: A gas was formed as one product, and it escaped into the air.

87.

Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, a nonmetal, or a metalloid. Which table was completed correctly?

a)
b)
c)
d)
88.

Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break protein molecules into individual amino acids. Which statement best describes changes to food during digestion?

a)

The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.

b)

The muscle contractions and the action of the peptidase both result only in physical changes.

c)

The muscle contractions result in chemical changes, while the action of the peptidase results in physical changes.

d)

The muscle contractions and the action of the peptidase both result only in chemical changes.

89.

The table lists some compounds found in foods and their formulas.

Based on this information, which of these statements is NOT true?

a)

A molecule of sorbitol contains three more oxygen atoms than a molecule of glutamine does.

b)

A molecule of lactose contains twice as many atoms as a molecule of fructose does.

c)

A molecule of fructose contains four more atoms than a molecule of glutamine does.

d)

A molecule of lactose contains twice as many carbon atoms as a molecule of sorbitol does.

90.

A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?

a)

Hot water heated the aluminum foil.

b)

The liquid solution changed color.

c)

The pan was lined with aluminum foil.

d)

The hot water cooled.

91.

Which of the following elements exist as a liquids at room temperature?

a)

Mercury and Fluorine

b)

Bromine and Mercury

c)

Bromine and Hydrogen

d)

Neon and Fluorine

92.

Energy is the ability to do

a)

things

b)

work

c)

transform

93.

Kinetic energy is the energy that a __________ object possesses.

a)

stationary

b)

moving

c)

stored

94.

Digestion is an example of

a)

chemical energy

b)

nuclear energy

c)

thermal energy

95.

The energy that comes from space or waves.

a)

heat

b)

electromagnetic

c)

chemical

96.

The energy of motion of a body.

a)

potential

b)

kinetic

c)

mechanical

d)

gravitational

97.

This form of energy is related to the movement or flow of electrons which carry a charge

a)

chemical

b)

electrical

c)

thermal

d)

radiant

98.

The energy of an object’s position.

a)

potential

b)

kinetic

c)

mechanical

d)

gravitational

99.

Energy can change from one form to another.

a)

True

b)

False

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