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Chemistry unit 1

Total questions: 147

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

A substance made up of atoms of two or more different elements joined by chemical bonds

a)

Compound

b)

Heterogeneous Mixture

c)

Homogeneous Mixture

d)

Solution

2.

Pure substance that consists entirely of one type of atom.

a)

Solution

b)

Mixture

c)

Compound

d)

Element

3.

Elements have the most similar properties if they are in the same _______?

a)

Periods

b)

Groups

c)

Rows

d)

Blocks

4.

What type of elements does the image show?

a)

Metals

b)

Nonmetals

c)

Gases

d)

Metalloids

5.

Which physical property would most likely be a nonmetal

a)

Good conductor

b)

Ductile

c)

Brittle

d)

Shiny

6.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

7.
An electron has what kind of charge?
a)
no charge
b)
positive 
c)
negative
d)
it depends
8.

How does oxygen become an oxide ion?

a)

it loses 2 electrons

b)

it gains 2 electrons

c)

it shares electrons

d)

it releases energy

9.

Valence electrons are found

a)

in the innermost energy level of an atom

b)

in the middle energy levels of an atom

c)

in the outermost energy levels of an atom

10.

Cations

a)

Gain electrons, has an overall positive charge

b)

Lose electrons, has an overall positive charge

c)

Lose electrons, has an overall negative charge

d)

Gain electrons, has an overall negative charge

11.

Anions

a)

Gain electrons, has an overall positive charge

b)

Lose electrons, has an overall positive charge

c)

Lose electrons, has an overall negative charge

d)

Gain electrons, has an overall negative charge

12.

How does calcium become an calcium ion?

a)

it loses 2 electrons

b)

it gains 2 electrons

13.

In a covalent bond, electrons are

a)

Gained

b)

Pulled apart

c)

Shared

d)

In the nucleus

14.

In ionic bonds, electrons are

a)

Gained or lost

b)

Shared

c)

Mixed randomly

d)

Negatively charged

15.
Elements are made of 
a)
many types of atoms 
b)
the periodic table
c)
one type of atom 
d)
molecules 
16.
What is the basic unit of matter and is the smallest particle of an element?
a)
Atoms
b)
Elements
c)
Compounds
d)
Molecules
17.

A pure substance that cannot be broken down into any other substance.

a)

Elements

b)

Compounds

c)

Mixtures

18.

A(n) ______________ is formed when two or more elements chemically combine.

a)

Compound

b)

Element

c)

Mixture

19.

What are the three main groups of the periodic table?

a)

groups

b)

metal

c)

nonmetals

d)

metalloids

e)

periods

20.

What are the vertical columns on the periodic called?

a)

groups

b)

periods

c)

nonmetals

d)

metals

e)

metalloids

21.

Use the periodic table in the picture to help you answer the question. Which element would have similar properties to Lithium (Li)?

a)

Beryllium (Be)

b)

Copper (Cu)

c)

Sodium (Na)

d)

Boron (B)

22.

Has a definite mass and volume, but not a definite shape

a)

solid

b)

liquid

c)

gas

d)

ice

23.

Liquids take the shape of their

a)

container

b)

mass

c)

matter

d)

water

24.

When water vapor changes back into a liquid, which process does it go through

a)

Condensation

b)

Evaporation

c)

Freezing

d)

Melting

25.

When water gets heated, it becomes water vapor through which process

a)

Condensation

b)

Evaporation

c)

Freezing

d)

Melting

26.

When ypu put water in the freezer and it becomes a solid, it goes through which process

a)

Condensation

b)

Evaporation

c)

Freezing

d)

Melting

27.

Which is an example of a gas?

a)

car

b)

water

c)

carbon dioxide

28.

In which form of matter do the atoms freely move around?

a)

solid

b)

liquid

c)

gas

29.

Why does ice stay at the top of oceans instead of sinking to the bottom? 

a)

Ice is colder than liquid water

b)

Ice is less dense than liquid water

c)

Ice is more dense than liquid water

d)

Ice is warmer than liquid water

30.

Why does ice float?

a)

As water freezes, it expands and its density decreases.

b)

As water freezes, air becomes trapped between the hydrogen bonds of water molecules. 

c)

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have greater buoyancy (floating ability). 

d)

As water freezes, it takes up more oxygen from the atmosphere, causing it to have greater buoyancy.

31.

Mixtures are created when two or more ______ are mixed together.

a)

liquids

b)

changes

c)

substances

d)

rocks

32.

How many atoms of Iron are in this compound?

a)

1

b)

2

c)

3

d)

4

33.

How many atoms of hydrogen are in

C6H12O6

a)

6

b)

12

c)

18

d)

2

34.

How many atoms of oxygen are in this compound?

2Ca(OH)2

a)

1

b)

2

c)

3

d)

4

35.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Coefficient
36.

How many valence electrons are in an atom of each element in Group 15 in the periodic table?



(a)  

37.

Which pair of properties describes the elements in Group 18?

a)

They are chemically stable and liquid at room temperature.

b)

They have eight valence electrons and are flammable.

c)

They are magnetic and boil at low temperatures.

d)

They are gaseous at room temperature and chemically stable.

38.

You can't live without water! What is its chemical formula?

a)

H2

b)

O2

c)

H2O

d)

H2O2

39.

Who is credited with the invention of the modern periodic table?

a)

Mendel

b)

Mendeleev

c)

Nobel

d)

Newland

40.

The symbol Ag stands for which element?

a)

Silver

b)

Gold

c)

Aluminium

d)

Antimony

41.

Elements in modern periodic table is arranged in basis of (a)  

42.

Group 1 elements are very reactive

a)

false

b)

true

43.

Group 1 elements have exciting reactions with water.

a)

false

b)

true

44.

The following elements are members of group 7 EXCEPT for one.

a)

chlorine

b)

hydrogen

c)

fluorine

d)

iodine

45.

Which of the following can be compressed easily?

a)

stone

b)

iron

c)

steel

d)

gas

46.

Which of the following is transparent?

a)

wood

b)

stone

c)

glass

d)

both (1) and (2)

47.

When sand is added to water.

a)

It will dissolve water

b)

it does not dissolve in water and settles down

c)

it does not dissolve in water and floats on top

d)

None of these

48.

What elements generally make an ionic bond ?

a)

Metal and nonmetal

b)

2 or more nonmetals

c)

2 or more metals

d)

2 elements

49.

An ionic bond is formed when

a)

Valence electrons are shared.

b)

Valence electrons surround the cations.

c)

Valence electrons are transferred between atoms.

d)

Valence electrons are completely transferred between two metals.

50.

Predict the bond formed between Be and F

a)

Covalent-bond

b)

Ionic-bond

c)

Metallic-bond

d)

Hydrogen-bond

51.

The symbol Au stands for :

a)

Gold

b)

Cadmium

c)

Zinc

d)

Krypton

52.

What do we call an atom that has more protons than electrons

a)

An anion

b)

A molecule

c)

A cation

d)

An isotope

53.

Tin

(a)  

54.

Potassium

(a)  

55.

Sodium

(a)  

56.

Which subatomic part of an atom gives it a positive charge?

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

57.

anything that occupies space and has mass

a)

chemistry

b)

weight

c)

object

d)

matter

58.

It is the ability of a material to be easily drawn into wires.

a)

malleability

b)

solubility

c)

ductility

d)

conductivity

59.

●semiconductors

a)

metals

b)

nonmetals

c)

metalloids

d)

plasma

60.

A __________ goes up and down on the periodic table.

a)

Group

b)

Period

61.

A _________ goes side to side on the periodic table.

a)

Group

b)

Period

62.

What properites do nonmetals have in common?

a)

Poor conductor of electricity

b)

Good conductor of thermal energy

c)

Soft and Malleable

d)

Shiny, lustrous surface

63.

Where are the nonmetals located on the Periodic Table?

a)

On the right

b)

On the left

c)

On the ZigZag Line

64.

Silicon has a dull, metallic luster, conducts heat well, and is brittle. What is it?

a)

Nonmetal

b)

Metal

c)

Metalloid

d)

None of the above

65.

What are electrons on the outermost energy level of an atom?

a)

Atomic

b)

Subscript

c)

Electron

d)

Valence

66.

What are two or more atoms held together by covalent bonds?

a)

Molecule

b)

Mineral

c)

Compound

d)

Element

67.

What is the quality of giving off light, brightness, glitter, brilliance?

a)

Brittle

b)

Luster

c)

Ductile

d)

Malleable

68.

What is the physical property that is capable of being changed; easily shaped?

a)

Ductile

b)

Brittle

c)

Malleable

d)

Luster

69.

What is a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction?

a)

Subscript

b)

Coefficient

c)

Atomic Number

70.

What is a number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound?

a)

Subscript

b)

Coefficient

c)

Atomic Number

71.
What element is often used in nuclear reactions?
a)
Hydrogen
b)
Uranium
c)
Oxygen
d)
Mercury
72.

Characteristics that can be observed without changing the substance.

a)

Chemical Change

b)

Physical Change

c)

Chemical Property

d)

Physical Property

73.

An element that is an insulator, dull, and brittle.

a)

Metal

b)

Nonmetal

c)

Metalloid

74.

An element that has properties of metals and nonmetals, is a semiconductor.

a)

Metal

b)

Nonmetal

c)

Metalloid

75.

How many Protons does a Carbon atom have?

a)

12

b)

6

c)

18

d)

14

76.

What is a "Valence Shell"

a)

The first electron shell

b)

Something you would find on the beach

c)

The outermost electron shell

d)

Any full electron shell

77.

How many valence electrons does Magnesium(Mg) have?

a)

1

b)

2

c)

3

d)

4

78.

How many valence electrons does Xenon(Xe) have?

a)

1

b)

4

c)

8

d)

18

79.

How many valence electrons does this Nitrogen atom have?

a)

15

b)

5

c)

2

d)

3

80.

Which is NOT a chemical property?

a)

rusting

b)

flammability

c)

color

d)

oxidization

81.

The picture represents which of the following?

a)

Compound

b)

Element

c)

Mixture

82.

The picture represents which of the following?

a)

Mixture

b)

Element

c)

Compound

83.

The picture represents which of the following?

a)

Element

b)

Mixture

c)

Compound

84.

The picture represents which of the following?

a)

Mixture

b)

Element

c)

Compound

85.

Is salt (NaCl) an element, compound, or mixture?

a)

Element

b)

Mixture

c)

Compound

86.

The atoms in a molecule are held together by:

a)

Gravitational forces

b)

Chemical bonds

c)

Friction

d)

Physical bonds

87.

An atom that has gained or lost one or more electrons

a)

ion

b)

electron

c)

neutron

d)

bond

88.
a)

Democritus

b)

Thomson

c)

Dalton

d)

Rutherford

89.
a)

Dalton

b)

Bohr

c)

Thomson

d)

Shrodinger

90.
a)

Bohr

b)

Shrodinger

c)

Chadwick

d)

Rutherford

91.

Which group in the periodic table is called the alkaline earth metals?

a)

Group 1

b)

Group 2

c)

Group 17

d)

Group 18

92.

Sodium has atom number 11 and a mass of 23 u.

What is the atom build like?

a)

p: 11

e: 11

n: 1

b)

p: 11

e: 12

n: 11

c)

p: 12

e: 12

n: 11

d)

p: 11

e: 11

n: 12

93.

What could be the salt shown in the diagram?

a)

Sodium carbonate

b)

Copper (II) sulphate

c)

Iron (II) sulphate

d)

Iron (III) nitrate

94.

What does this picture represent?

a)

Element

b)

Compound

c)

Mixture

95.

Is combining magnesium metal and acid to produce hydrogen gas a physical or chemical change?

a)

Physical

b)

Chemical

96.

Is mixing paint colours a physical or chemical change?

a)

Physical

b)

Chemical

97.

How many valence electrons does Nitrogen Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

98.

The number of protons in the nucleus of an atom?

a)

Isotope

b)

Atomic mass

c)

Atomic number

d)

Element

99.

An atom of iodine has 7 valence electrons. What will an atom of iodine MOST likely do to be stable?

a)

Lose 1 electron

b)

Lost 7 electrons

c)

Gain 1 electron

d)

Neither gain nor lose any valence electrons

100.

An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable?

a)

Gain 1 electron

b)

Lose 2 electrons

c)

Lose 8 electrons

d)

Neither gain nor lose any valence electrons

101.

Which of the following statements correctly differentiates pure substances from mixtures?

a)

Pure substances do not produce new substances when combined together, unlike mixtures that form a new material with different properties.

b)

Pure substances may be broken down into simpler forms through physical means, while mixtures have components that are inseparable.

c)

Pure substances have fixed composition, while components of mixtures vary.

d)

Pure substances and mixtures are both made up of similar kinds of atoms all throughout.

102.

What type of bond is formed when ions of opposite charges are attracted to one another?

a)

covalent

b)

ionic

c)

hydrogen

103.

What particles move around the nucleus of the atom and are negatively charged ?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Positrons

104.

Which of the following is not a metal ?

a)

Gold

b)

Silver

c)

Copper

d)

Carbon

105.

What is the chemical name of water?

4 lines
106.

The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

a)

1:1

b)

2:1

c)

4:1

d)

1:2

107.

Q. 1     How many rows and columns are in the modern form of the periodic table?

a)

a) 7 & 18        

b)

b) 18 & 7        

c)

c) 9 & 18        

d)

d) 18 & 9

108.

Q.2      Inert gases are placed in which group of the periodic table?

a)

a)18th group                

b)

b) Zeroth group

c)

c) VIII A

d)

d) all of these

109.

Q.4      Which group elements are called halogens?

a)

a) 17th

b)

b) VII A

c)

c) fluorine family

d)

d) All of the above

110.

What is Flammability?

a)

Substances that range from being stable to being highly reactive depending on the presence of other substances or particular con­ditions.

b)

Whether a substance will burn or not.

c)

How much damage a substance will do to a particular organism.

111.

What is an element?

a)

A pure substance that consists of two or more kinds of atoms

b)

A pure substance that consists of only one kind of atom

c)

A mixed substance with only one kind of atom

d)

The smallest particle in an element

112.

What is conductivity?

a)

Materials that can be drawn into long, thin wires

b)

Materials that can transfer heat and electricity from one particle to another

c)

Materials that can be hammered easily into shapes

d)

The amount of matter packed into a given value

113.

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

114.

Ionic bonds are between

a)

metals and nonmetals

b)

2 metals

c)

2 nonmetals

115.

How are ionic bonds formed?

a)

transfer of electrons

b)

sharing of electrons

116.

Salt is an example of what?

a)

ionic compound

b)

covalent compound

117.

What type of bonding does this picture show?

a)

Ionic

b)

Covalent

118.

What type of bonding does this picture show?

a)

Ionic

b)

Covalent

119.

Valence electrons are transferred

a)

Ionic bonds

b)

Covalent bonds

120.

Valence electrons are shared

a)

Ionic bonds

b)

Covalent bonds

121.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
122.

The positive ions tend to _____________ electrons.

a)

lose

b)

gain

123.

The negative ions tend to _____________ electrons.

a)

lose

b)

gain

124.

What type of elements form cations?

a)

metals

b)

nonmetals

c)

metalloids?

125.

How does calcium become a calcium ion?

a)

it loses 2 electrons

b)

it gains 2 electrons

126.

Name the following ionic compound: NaCl

a)

sodium chloride

b)

sodium chlorine

c)

nitrogen chlorine

d)

nitrogen chloride

127.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
128.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
129.

written above the line to indicate the charge (oxidation number) of the ion.

a)

Superscript

b)

Anion

c)

IUPAC

d)

Product

130.

How many VALENCE ELECTRONS does Chlorine have?

a)

2

b)

7

c)

8

d)

10

e)

17

131.

Ionic bonds are formed when electrons get

a)

Shared between two atoms

b)

Removed from both atoms

c)

Transferred from one atom to another

d)

Added to both atoms

132.

What is the correct formula for Sodium Chloride?

a)

SCl

b)

NaCl

c)

SC

d)

NaCl2

133.

Write the chemical formula for K and Br (potassium bromide).

a)

KBr

b)

K2Br

c)

KBr3

d)

KBr2

134.
Is this ionic bond drawn correctly?
a)
Yes
b)
No
135.

How many valence electrons does hydrogen have?

a)

1

b)

2

c)

3

d)

4

136.

Sodium and Bromine will make a _____ bond

a)

Ionic

b)

Hydrogen

c)

Covalent

d)

Exploding

137.

Why do all bonds form?

a)

filling the outermost energy level

b)

to win

c)

to make other atoms unstable

d)

to be famous

138.

 

NaCl

a)

metallic

b)

covalent

c)

Ionic

139.

Hydrogen and Chlorine will from a ____ bond

a)

Unique

b)

bestie

c)

Covalent

d)

Ionic

140.

How many valence electrons in this structure ?

a)

4

b)

5

c)

6

d)

7

141.

Predict the bond formed between Be and F

a)

Covalent-bond

b)

Ionic-bond

c)

Metallic-bond

d)

Hydrogen-bond

142.

Metals make _____ ions.

a)

positive

b)

negative

c)

neutral

143.

When an ionic bond is formed, electrons are _____.

a)

gained

b)

lost

c)

shared

d)

gained or lost

144.

What happens when two negatively charged ions are pushed together?

a)

they will repel (move apart)

b)

they will be attracted to each other (move together)

145.

Will a chlorine atom gain or lose electrons?

a)

gain

b)

lose

146.

Will a sodium atom gain or lose electrons?

a)

gain

b)

lose

147.

Why are sodium and chlorine attracted to each other?

a)

they have opposite charges

b)

they both have negative charges

c)

they both have positive charges

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