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PS SEM1 REVIEW

Total questions: 90

Worksheet time: 1hrs 7mins

Name
Class
Date
1.

What is an atom's nucleus made of?

a)

protons and electrons

b)

protons only

c)

protons and neutrons

d)

neutrons only

2.

Atoms of the same element that have different number of neutrons are called

a)

molecules

b)

ions

c)

protons

d)

isotopes

3.

Which particles determine the ATOMIC NUMBER of an element?

a)

protons only

b)

neutrons and protons

c)

neutrons only

d)

protons and electrons

4.

Two different isotopes of an element have different

a)

number of neutrons

b)

numbers of protons

c)

atomic numbers

d)

nothing is different about them

5.

The maximum number of electrons that can occupy the 2nd shell of an atom of magnesium is

a)

1

b)

2

c)

8

d)

18

6.

What is the correct electron arrangement for sulfur? (HINT: think about electron shells/energy levels)

a)

2-8-6

b)

2-8-8

c)

4-6-2

d)

2-8-4

7.

An atom is neutral because

a)

neutrons balance the protons and electrons

b)

nuclear forces stabilize the charges

c)

the number of protons and electrons are equal

d)

the numbers of protons and neutrons are equal

8.

Which part of the periodic table indicates the number of energy levels in the electron cloud?

a)

group

b)

family

c)

valence electrons

d)

period

9.

Which statement about the arrangement of the periodic table is not true?

a)

Noble gases are in the group farthest to the right.

b)

Metals are found on the left side of the periodic table.

c)

Rare earth elements are found in the first two columns o nteh left.

d)

Transition metals are in the center of the periodic table.

10.

Which of the following elements would be the MOST reactive?

a)

iodine

b)

silicon

c)

silver

d)

argon

11.

Hydrogen is in group 1 with Lithium, Sodium, Potassium, Cesium, and Francium because it

a)

is a metal

b)

is a gas

c)

has 1 valence electron

12.

How many protons are in the following atom?

a)

82

b)

125

c)

207

d)

189

13.

A subatomic particle with a positive charge

a)

proton

b)

neutron

c)

electron

d)

nucleus

14.

The negatively charged area around the nucleus where the volume of the atom is located

a)

electron

b)

nucleus

c)

electron cloud

d)

quark

15.

Which of the following is a property of non-metals?

a)

shiny

b)

good conductor

c)

poor conductor

d)

silvery solid

16.

The element that is an alkaline earth metal and has 3 energy levels must be

a)

magnesium

b)

calcium

c)

francium

d)

barium

17.

The semi-conductors or metalloids are located

a)

on the right side of the periodic table

b)

in the middle of the periodic table

c)

on the staircase of the periodic table

18.

What isotope is shown here? (Red = protons, gray = neutrons, blue = electrons)

a)

Beryllium-5

b)

Beryllium-9

c)

Boron-4

d)

Boron-9

19.

The chemical bond formed when two atoms SHARE electrons is a (an)

a)

covalent bond

b)

ionic bond

c)

metallic bond

20.

Which element is most likely to GAIN electrons in a chemical bond?

a)

Kr

b)

K

c)

Br

d)

Ca

21.

Which formula represents substances that contain COVALENT bonds?

a)

LiCl

b)

CaCl2

c)

K2O

d)

CO

22.

Which atoms are most like to form COVALENT bonds?

a)

metals that share electrons

b)

metals that share protons

c)

nonmetals that share electrons

d)

nonmetals that share protons

23.

How many electrons are needed in the outer energy level of most atoms to complete the octet?

a)

2

b)

4

c)

6

d)

8

24.

Why do elements form compounds?

a)

to be stable

b)

to be happy

c)

to remain charged

25.
KCl
a)
Krypton Chloride
b)
Potassium Chlorine
c)
Potassium Chloride
d)
Potassium Monochloride
26.
What is the correct formula for Sodium Oxide?
a)
NaO
b)
NaO2
c)
Na2O
d)
Na2O2
27.

What two types of atoms make a covalent bond?

a)

2 non-metals

b)

1 metal and 1 non-metal

c)

2 metals

28.
What is the name of Br6F10 ?
a)
Bromium fluoride
b)
Hexabromine fluoride
c)
Bromium decafluoride
d)
none of the above
29.
A covalent compound made of one sulfur and two oxygen atoms would be named
a)
sulfur dioxide.
b)
sulfur oxide.
c)
disulfur oxide.
d)
sulfide oxygen.
30.

Select the correct formula for the

COVALENT COMPOUND

carbon tetrachloride

a)

CCl

b)

CCl2

c)

C4Cl2

d)

CCl4

31.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

32.

What is a hypothesis?

a)

A hypothesis is the right answer to an experiment.

b)

A hypothesis is the wrong answer to an experiment.

c)

A hypothesis is an educated guess.

33.

Data we get by using our senses.

a)

inferences

b)

observations

c)

hypothesis

34.

A series of organized steps used by scientists to solve a problem or answer a question.

a)

scientific method

b)

recipe

c)

data collection

d)

metric system

35.

A factor in the experiment.

a)

Independent Variable

b)

Dependent Variable

c)

Variable

d)

Control Variable

36.

Variable that the SCIENTIST CHANGES or TESTS.

a)

Control Variable

b)

Variable

c)

Dependent Variable

d)

Independent Variable

37.

Variable that is MEASURED or OBSERVED; it DEPENDS on the independent variable.

a)

Control Variable

b)

Variable

c)

Dependent Variable

d)

Independent Variable

38.

Variable that the scientist keeps CONSTANT or the SAME.

a)

Control Variable

b)

Variable

c)

Dependent Variable

d)

Independent Variable

39.

Qualitative or Quantitative Observation?:

The cat has orange fur on his ears.

a)

Qualitative

b)

Quantitative

40.

What step does every scientific experiment begin with?

a)

hypothesis

b)

question/problem

c)

procedures

d)

conclusion

41.

The summary at the end of an experiment that explains the results.

a)

conclusion

b)

procedures

c)

materials

d)

hypothesis

42.

Where does an Inference belong in the Scientific Method?

a)

In the Beginning (steps 1 or 2)

b)

At the End (steps 5 and 6)

43.

Lucky Charms Cereal

a)

Compound

b)

Element

c)

Mixture

44.

Mg

a)

Compound

b)

Element

c)

Mixture

45.

Salt (NaCl)

a)

Compound

b)

Element

c)

Mixture

46.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
47.
a)
Element
b)
Compound
c)
Mixture
48.
a)
Element
b)
Compound
c)
Mixture
49.
a)
Element
b)
Compound
c)
Mixture
50.
a)
Element
b)
Compound
c)
Mixture
51.
a)
Element
b)
Compound
c)
Mixture
52.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
53.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

54.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

55.

Melting butter for popcorn is a

a)

chemical change

b)

physical change

56.

Which of the following are physical properties of the matter pictured?

Check all that are true

a)

reacts to oxygen

b)

smooth

c)

malleable (bendable)

d)

reddish-brown

e)

shiny

57.

Which statement best describes what is happening in the images?

a)

a physical change

b)

a chemical change

c)

both a physical and a chemical change

d)

dissolving

58.

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

a)

Physical change

b)

Chemical change

c)

No change

59.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

60.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

61.
What type of mixture is this?
a)
heterogeneous 
b)
homogeneous
62.
What is matter?
a)
a pure substance
b)
anything that occupies space and possesses mass
c)
an element
d)
a compound
63.
Which of the following is not a chemical property? 
a)
rusting 
b)
boiling 
c)
rotting 
d)
burning 
64.

 

What two types of measurements make up DENSITY? 

a)

Volume and Weight

b)

Temperature and Mass

c)

Mass and Volume

65.

Measuring the volume of a block uses which equation

a)

Length ×Width×HeightLength\ \times Width\times Height  

b)

(radius)2×Length×π\left(radius\right)^2\times Length\times\pi  

66.

A block has a mass of 20.0 g and a volume of 40.0 cm3. What is its density?

a)

2.0 g/cm3

b)

1.2 g/cm3

c)

0.5 g/cm3

d)

4.0 g/cm3

67.
If you have a gold brick that is 2 cm by 3 cm by 4 cm and has a density of 19.3 g/cm3, what is its mass?
a)

263.5 g/cm3

b)
463.2 g
c)
0.804 kg
d)

2.804 g

68.

Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?

a)

9 mL

b)

7 g/cm3

c)

28 g/cm3

d)

1/7 g/cm3

69.

Find the density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g.  

(Hint: find the volume first!)

a)

13 g/cm3

b)

2 g/cm3

c)

10 g/cm3

d)

8  g/cm3

70.

If a block of wood has a density of 0.6 g/cm3 and a mass of 120 g, what is its volume?

a)

300 cm3

b)

200 cm3

c)

100 mL

d)

150 cm3

71.
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
72.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
73.

All particles in matter are identical (fixed composition)

a)

substance

b)

matter

c)

mixture

74.

Simplest form of matter from which more complex substances are made

a)

element

b)

compound

c)

mixture

75.

Two or more elements chemically combined in a fixed proportion

a)

compound

b)

element

c)

mixture

76.

These do not have a uniform composition.

a)

Homogeneous

b)

Heterogeneous

77.

Which of the following describes a difference between compounds and mixtures?

a)

Compounds can be broken down only by chemical reactions and mixtures can be physically separated.

b)

Mixtures and chemically combined and compounds are physically combined.

c)

Compounds can be heterogeneous and mixtures cannot.

78.

Temperature at which a solid becomes a liquid

a)

Melting Point

b)

Boiling Point

c)

Freezing Point

79.

Temperature at which a liquid becomes a gas

a)

Melting Point

b)

Boiling Point

c)

Viscosity

80.

A fluid's resistance to flow

a)

viscosity

b)

density

c)

combustibility

d)

solubility

81.

A measure of how well a solute dissolves in a solvent

a)

solubility

b)

combustibility

c)

flammability

82.

A law that states mater is neither created or destroyed

a)

The Law of Conservation of Matter

b)

The Law of Conservation of Properties

c)

The Law of Conservation of Chemistry

83.
True or False: a physical change may produce a new substance.
a)
True
b)
False
84.

Compactness or consistency of a material

a)

Density

b)

Solubility

c)

Solvent

d)

Flammability

85.

The thing that is being dissolved in the solution

a)

Solute

b)

Solvent

c)

Solution

86.

How easily a substance will set on fire

a)

Combustibility

b)

Solubility

c)

Density

87.

How easily a substance reacts, usually with an acid or a base

a)

Reactivity

b)

Combustibility

c)

Solubility

88.

How easily a substance reacts with oxygen

a)

oxidation

b)

reaction

c)

combustion

89.

Matter must be classified as either a substance or a

a)

mixture

b)

compound

c)

element

90.

Which of the following are chemical properties?

a)

hardness

b)

luster

c)

solubility

d)

combustibility

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