Free Printable PS 2nd Semester Review

1.

How do ions form?

a)

when atoms lose or gain electrons

b)

when atoms lose or gain protons

c)

when atoms lose or gain neutrons

d)

only when an atom loses electrons

2.

Elements that react similarly to each other behave this way because:

a)

they are located in the same period (same # valence electrons)

b)

they are located in the same group (same # valence electrons)

c)

they are located in the same period (same # of energy levels)

d)

they are located in the same group (same # of energy levels)

3.

What would the formula be for a compound of the two elements in the model shown to the left?

a)

$KO$

b)

$K_2O$

c)

$KO_2$

d)

$K_2O_2$

4.

When an atom gains electrons it results in:

a)

an isotope with a positive charge

b)

an ion with a positive charge

c)

an isotope with a negative charge

d)

an ion with a negative charge

5.

Which of the following formula and chemical name combinations is correctly shown?

a)

$SiO_2\ ;\ Silicon\ oxide$

b)

$KBr\ ;\ Phosphorus\ bromide$

c)

$NaF\ ;\ Sodium\ monofluoride$

d)

$NaI\ ;\ Sodium\ iodide$

6.

Of the compound names provided, which one represents a compound that is made up of MORE than two atoms?

a)

sodium sulfide

b)

potassium bromide

c)

lithium chloride

d)

barium oxide

7.

In the equation shown, if 5 grams of nitrogen (N) reacts with lithium (Li) to produce 8 grams of Lithium nitride ( $Li_3N$ ), then how many grams of lithium was used in the reaction? $6Li\ +\ N_2\ \rightarrow\ 2Li_3N\$

a)

2 g of Li

b)

3 g of Li

c)

5 g of Li

d)

8 g of Li

8.

Which equation below represents the law of conservation of mass?

a)

$NO+Cl_2→2NOCl$

b)

$2TiCl_3+2Cl_2→2TiCl_4$

c)

$2B+O_2→2B_2O_3$

d)

$4Cr+3O_2→2Cr_2O_3$

9.

Identify the type of reaction shown below:

$2La+3Br_2→2LaBr_3$

a)

synthesis

b)

single replacement

c)

double replacement

d)

combustion

e)

decomposition

10.

Identify the type of reaction shown below:

$4Al+3MnO_2→2Al_2O_3+3Mn$

a)

synthesis

b)

single replacement

c)

double replacement

d)

combustion

e)

decomposition

11.

Identify the type of reaction shown below:

$CuCl_2+Na_2S→CuS+2NaCl$

a)

synthesis

b)

single replacement

c)

double replacement

d)

combustion

e)

decomposition

12.

Identify the type of reaction shown below:

$SOCl_2→SO+Cl_2$

a)

synthesis

b)

single replacement

c)

double replacement

d)

combustion

e)

decomposition

13.

Identify the type of reaction shown below:

$C_3H_8\ +\ 5O_{2\ }\ \rightarrow\ 3CO_2\ +\ 4H_2O$

a)

synthesis

b)

single replacement

c)

double replacement

d)

combustion

e)

decomposition

14.

Identify the modelthat represents the molecular arrangement of a gas in the image:

a)

A

b)

B

c)

C

15.

Select the coefficients below that would correctly balance the following equation: $NaN_3→Na+N_2$

a)

1:1:3

b)

2:2:3

c)

2:1:3

d)

1:2:3

16.

The law of conservation of mass states that __________ .

a)

matter can be created and destroyed but does not change forms

b)

in a chemical reaction, matter is not created or destroyed, but is conserved

c)

in a chemical reaction, efforts should be made to preserve rare elements without changing them

d)

in a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants

17.

What does it mean for a chemical equation to be balanced?

a)

The solid products weigh the same as the reactants.

b)

The number of reactants is equal to the number of products.

c)

There are the same number of atoms of each element on both sides of the equation.

d)

The reactants and the products are written with the same coefficients.

18.

Identify the molecular arrangement that represents the molecules with the greatest amount of energy

a)

A

b)

B

c)

C

19.

Identify the model that represents the molecular arrangement of a solid in the image:

a)

A

b)

B

c)

C

20.

How do gases respond to a decrease in temperature?

a)

kinetic energy decreases while volume increases

b)

kinetic energy increases and volume increases

c)

kinetic energy increases while volume decreases

d)

kinetic energy decreases and volume decreases

21.

If pressure of a gas is increased and its volume remains constant, what will happen to its temperature?

a)

increase

b)

decrease

c)

stay the same

22.

The solubility curve for potassium nitrate is shown in the diagram.Which one of the following statements is NOT correct?

a)

At 40ºC, no more than 63 grams of potassium nitrate will dissolve in 100 grams of water.

b)

The solution is said to be supersaturated when 160 grams of the salt are added to 100 grams of water at 60ºC

c)

100 grams of potassium nitrate will completely dissolve in 100 grams of water at 50ºC.

d)

When 80 grams of potassium nitrate are added to 100 grams of water at 40ºC, about 15 grams of the salt will remain undissolved.

23.

If the amount of dissolved solute in a solution at a given temperature is greater than the amount that can permanently remain in solution at that temperature, the solution is said to be

a)

saturated

b)

unsaturated

c)

supersaturated

d)

diluted

24.

What kinds of solutions are made when a solution’s temperature increases?

a)

unsaturated

b)

supersaturated

c)

saturated

25.

Of the compound names provided, which one represents the compound with the GREATEST number of atoms?

a)

magnesium chloride

b)

potassium bromide

c)

lithium chloride

d)

barium oxide

26.

Which of the following is NOT a property of covalent compounds?

a)

Low boiling points

b)

Poor conductors of heat and electricity

c)

Solids are brittle and variously colored

d)

Superior malleability

27.

Which solution below has the HIGHEST concentration of sugar?

a)

7g of sugar in 150mL of water

b)

7g of sugar in 250mL of water

c)

7g of sugar in 25mL of water

d)

7g of sugar in 60mL of water

28.

Which solution below has the LOWEST concentration of sugar?

a)

7g of sugar in 150mL of water

b)

7g of sugar in 250mL of water

c)

7g of sugar in 25mL of water

d)

7g of sugar in 60mL of water

29.

Select the statement that best describes the atoms shown in the image.

a)

each of the atoms represent a different element

b)

each of the atoms represents ions of the same element

c)

each of the atom represents isotopes of the same element

d)

none of these atoms are neutral atoms

30.

Thinking about reactions, which description below best describes them:

a)

atoms are rearranged during chemical reactions with all atoms present in the reactants also present in the products

b)

rearranged during nuclear reactions with all atoms present in the reactants also present in the products

c)

the amount of energy released in chemical reactions is greater than the amount of energy released during nuclear reactions

d)

alpha, beta or gamma rays are released from the nuclei of the atoms during chemical reactions

31.

Low melting point and low solubility in water are general properties of

a)

ionic compounds

b)

covalent compounds

c)

chemical compounds

d)

nuclear reactions

32.

High melting point and solids at room temperature are general properties of

a)

ionic compounds

b)

covalent compounds

c)

chemical compounds

d)

nuclear reactions

33.

In nuclear reactions, which type of decay changes the structure of the nucleus but does NOT change the identity of the element?

a)

gamma decay

b)

alpha decay

c)

beta decay

d)

positron emission

34.

The three types of nuclear radiation in order of decreasing penetrating power are

a)

gamma, alpha, beta

b)

beta, alpha, gamma

c)

alpha, gamma, beta

d)

alpha, beta, gamma

35.

How are fission and fusion different from each other?

a)

fusion forms lighter isotopes and fission forms heavier isotopes

b)

fission forms lighter isotopes and fusion forms heavier isotopes

c)

fusion reactions convert all mass into energy and fission does not

d)

fission reactions convert all mass into energy and fusion does not

36.

After 22,800 years, approximately what percentage of the original carbon-14 remains?

a)

3.125%

b)

6.25%

c)

12.5%

d)

15%

37.

The oxidation number for Fe in Fe₂O₃:

a)

+2

b)

+3

c)

+1

d)

-2

38.

Ca²⁺ and N^3- create

a)

Ca₂N₃

b)

Ca₃N₂

c)

CaN₃

d)

Ca₂N

39.

Mg²⁺ and Cl^- create

a)

Mg₂Cl

b)

MgCl

c)

Mg₂Cl₂

d)

MgCl₂

40.

Potassium and Sulfur create

a)

KS₂

b)

KS

c)

K₂S

d)

K₂S₂

41.

What is a problem with using nuclear energy?

a)

treated waste materials are stored safely underground and do not pose a threat

b)

nuclear reactions produce a radioactive waste that remains radioactive for thousands of years

c)

There is a limited supply of uranium used to fuel nuclear power plants

d)

fuel rods are reused so there is no nuclear waste

42.

A sample of bismuth-212 has a mass of 5.28g after 181.5 seconds. What was the starting mass of the sample if the half-life is 60.5 seconds

a)

0.66g

b)

1.32g

c)

5.28g

d)

10.56g

43.

A sample of argon-39 has a starting mass of 789g. After 807 years there is 98.63g remaining. What is the half-life of argon-39?

a)

135 years

b)

538 years

c)

269 years

d)

180 years

44.

Which chemical produces an H₃O when mixed with water?

a)

Acid

b)

Base

c)

Salt

45.

Which sequence of elements is correctly ordered from LEAST number of valence electrons to GREATEST?

a)

antimony < iodine < rubidium

b)

rubidium < antimony < iodine

c)

antimony < rubidium < iodine

d)

iodine < antimony < rubidium

46.

The solubility curve for potassium nitrate is shown in the diagram. What is the maximum amount that can be dissolved in 100g of water at $50\degree C$ ?

a)

82g

b)

75g

c)

62g

d)

25g

47.

Of the following sources of energy, which provides the MOST energy?

a)

Petroleum/Oil

b)

Geothermal

c)

Nuclear

d)

Biofuel

48.

Temperature _____________ the solubility of a solid; Temperature _____________ the solubility of a gas.

a)

increase, increase

b)

increase, decrease

c)

decrease, decrease

d)

decrease, increase

49.

Which pH number below reflects a strong base?

a)

1

b)

6

c)

8

d)

13

50.

The solubility curve for potassium nitrate is shown in the diagram. If 40 g of potassium nitrate is added to 100g of water at $10\degree C$ , how much of the 40g did not dissolve?

a)

22g

b)

18g

c)

24g

d)

32g

51.

Select all of the following that will increase the rate at which a solute dissolves in a solvent.

a)

Increasing the particle size of the solute

b)

Increasing the temperature

c)

Increasing the surface area of the solute

d)

Stirring the solvent

52.

Which pH number below reflects a weak acid?

a)

1

b)

6

c)

8

d)

13

53.

Which pH number below reflects a strong acid?

a)

1

b)

6

c)

8

d)

13

54.

Which chemical produces an (OH-) when mixed with water?

a)

Acid

b)

Base

c)

Salt

55.

If my charge becomes 2+ what does that say about me?

a)

I am stealing 2 electrons

b)

I am losing 2 electrons

c)

I am in period 2

d)

I have an atomic # of 2

56.

According to the pH scale image, what type of compound is lye?

a)

salt

b)

element

c)

base

d)

acid

57.

If I gain electrons I become

a)

Positive because I've added to my atom

b)

negative because I've added electrons

c)

same because i'm balanced

d)

equal because now I have electrons

58.

When metals bond with non-metals they form what type of bonds

a)

covalent

b)

ionic

c)

cooperative

d)

lewis

59.

Which list below contains ONLY ionic compounds?

a)

$CaCO_3\ ,\ H_2O\ ,\ LiOH$

b)

$NH_3\ ,\ K_2O\ ,\ HNO_3$

c)

$CaCO_3\ ,\ MgO\ ,\ LiOH$

d)

$NO_2\ ,\ MgO\ ,\ CuCl_2$

60.

How do the following two elements bond together?Cr³⁺ O^2-

a)

CrO

b)

CrO₃

c)

Cr₃O₂

d)

Cr₂O₃

61.

Which pH number below reflects a weak base?

a)

1

b)

6

c)

8

d)

13

62.

Select the best description of the particles of a gas:

a)

particles are electrically charged

b)

particles vibrate in a fixed position

c)

particles slide over and past each other

d)

particles move fast and at random

63.

How many neutrons does the isotope of lithium have?

a)

8

b)

3

c)

4

d)

5

64.

What are the products to a neutralization reaction?

a)

H₂ + Ionic Salt

b)

H₂O + Ionic Salt

c)

H₃O⁺ + Ionic Salt

d)

OH^- + Ionic Sal

65.

During a phase change, what happens to the temperature of a substance?

a)

it decreases

b)

it increases

c)

it remains constant

d)

it both increases or decreases

66.

Ions are created by changing the number of

a)

protons

b)

neutrons

c)

electrons

67.

Identify the phase change that has occurred when frost forms on your windows overnight.

a)

sublimation

b)

deposition

c)

vaporization

d)

melting

68.

What type or classification of change occurs when a substance changes from a liquid to a gas?

a)

a phase change

b)

a physical change

c)

an irreversible change

d)

a chemical change

69.

Select all of the properties that would describe metals:

a)

dull in appearance

b)

conduct electricity

c)

brittle

d)

malleable

e)

shiny

70.

What is the charge of ion that has 12 protons and 10 electrons?

a)

+2

b)

-2

c)

+1

d)

-1

71.

Select all of the properties that would describe nonmetals:

a)

dull in appearance

b)

do not conduct electricity

c)

brittle

d)

malleable

e)

shiny

72.

Isotopes are created by changing the number of

a)

protons

b)

neutrons

c)

electrons

73.

What do the vertical columns on the periodic table tell us?

a)

The number of orbitals/energy levels

b)

The number of valence electrons (electrons on the outer most shell)

c)

the period

74.

What do the rows on the periodic table tell us?

a)

The number of orbitals/energy levels

b)

The number of valence electrons (electrons on the outer most shell)

c)

the group

75.

What are the rows on the periodic table called?

a)

periods

b)

groups

76.

What are the columns on the periodic table called?

a)

periods

b)

groups

77.

Which group number is called the "noble gases"?

a)

group 1

b)

group 2

c)

group 18

d)

group 17

78.

What two types of atoms make a covalent bond?

a)

2 Nonmetals

b)

1 Nonmetal and 1 Metal

c)

2 Metals

d)

2 Noble Gases

79.

What is the correct name for C₄H₆?

a)

Carbon Hexahydride

b)

Pentacarbon Pentahydride

c)

Hexacarbon Tetrahydride

d)

Tetracarbon Hexahydride

80.

What is the correct name for NO?

a)

Mononitrogen Monoxide

b)

Nitrogen Monoxide

c)

Mononitrogen Dioxide

d)

Nitrogen Oxide

81.

What is the formula for Tricarbon Octahydride?

a)

Ca₃O

b)

C₂H₈

c)

C₃H₈

d)

Ca₃H₈

82.

PBr₅

a)

Phosphorus Bromide

b)

Phosphorus Pentabromide

c)

Pentaphosphorus bromide

d)

Phosphorus Bromine

83.

When the temperature of matter decreases the particles

a)

speed up and move farther apart

b)

speed up and move closer together

c)

slow down and move closer together

d)

slow down and move farther apart

84.

Which figure represents the molecules with the MOST energy?

a)

A

b)

B

c)

C

PS 2nd Semester Review

Total questions: 84

Worksheet time: 3600secs

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