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Worksheets

Science Mid-Term

Total questions: 192

Worksheet time: 2hrs 55mins

Name
Class
Date
1.

electrons that have the highest energy in any element

a)

Valence Electrons

b)

Electrons

c)

Electron Dot

d)

Chemical Bond

2.

The number of valence electrons in each atoms helps determine the physical properties of that element.

a)

True

b)

False

3.

Which is a way to tell how many valence electron there are?

a)

Valence Electron

b)

Chemical Bond

c)

Electron Dot Diagram

d)

Chemical Bond

4.

Atoms tend to be more stable when they have --- valence electrons.

a)

8

b)

9

c)

10

d)

7

5.

the force of attraction holds atoms together as a result of the rearrangement of electrons between them

a)

Valence Electrons

b)

Electron Dot

c)

Chemical Bond

d)

None of the Above

6.

The number of valence electrons increases from right to left.

a)

True

b)

False

7.

Among noble gases, which one is the only one that does not have 8 valence electrons?

a)

Neon

b)

Helium

c)

Argon

d)

Krypton

8.

Metal atoms react by --- their valence electrons

a)

Gaining

b)

Losing

9.

The reactivity of a metal depends on what?

a)

How easily its atoms LOSE valence eletrons

b)

How easily its atoms GAIN valence electrons

10.

The reactivity of metals decreases from left to right.

a)

True

b)

False

11.

Halogens have -- valence electrons

a)

9

b)

8

c)

7

d)

6

12.

An atom that loses one of its electrons becomes -- charged

a)

positively

b)

negatively

13.

an atom that gains the electron becomes ---- charged

a)

negatively

b)

positively

14.

an atom or group of atoms that has an electrical charge

a)

Electron

b)

Atom

c)

Ion

d)

Iron

15.

Metal atoms are more likely to gain electrons.

a)

True

b)

False

16.

Nonmetal are more likely to gain electrons.

a)

True

b)

False

17.

What does polyatomic mean?

a)

Many ions

b)

Many electrons

c)

Many charges

d)

Many atoms

18.

Ions need an ion with the -- charge in order to be stable.

a)

Opposite

b)

Same

19.

TELLS the ratio of elements in a compound

a)

Chemical Formula

b)

Subscripts

c)

Ions

d)

Ionic compound

20.

three dimensional arrangement formed by an ion

a)

Crystal

b)

Crystalline

c)

Amorphous

d)

Cube

21.

How do ionic compounds form solids?

a)

Destroying a pattern of ions

b)

Ignoring a pattern of ions

c)

Building a pattern of ions

d)

Jogging a pattern of ions

22.

Ionic compound has a high melting points.

a)

True

b)

False

23.

When ionic compound melts, the ions are free to move

a)

True

b)

False

24.

If charged particles cannot move, there is no current.

a)

True

b)

False

25.

Which one of these can metals be classified as?

a)

Thermal/electrical conductivity

b)

Melting Temp

c)

Mass

d)

Appearance

26.

Thermal conductivity transfer --

a)

cold

b)

current

c)

feelings

d)

heat

27.

What is corrosion?

a)

deterioration of mass

b)

deterioration of skin

c)

deterioration of temperature

d)

deterioration of metal

28.

ease/speed of reaction with other substances

a)

reactivity

b)

corrosion

c)

luster

d)

ductile

29.

What is the most reactive metals?

a)

Alkaline Earth Metals

b)

Noble Gases

c)

Transition Metals

d)

Alkali Metals

30.

Alkali metals have low densities and melting points.

a)

True

b)

False

31.

Alkaline Metals are soft and less dense.

a)

True

b)

False

32.

Alkaline earth metals at higher temperatures.

a)

True

b)

False

33.

Most transition metals are -- solids

a)

hard/shiny

b)

hard/dull

c)

soft/shiny

d)

soft/dull

34.

In transition metal, -- is the only liquid at room temperature.

a)

Gold

b)

Silver

c)

Mercury

d)

Copper

35.

Transition metals are not malleable

a)

True

b)

False

36.

Nonmetals are poor conductors of heat/electrical currents.

a)

True

b)

False

37.

Solids nonmetals tend to be ---and brittle

a)

Reflective

b)

Shiny

c)

Dull

d)

Sad

38.

When nonmetals and metals react, electrons

a)

move from the nonmetals atoms to the metals atoms

b)

move from the metal atoms to the nonmetal atoms

c)

stay in the place they are

d)

Do nothing

39.

the important role in the chemistry of life

a)

Carbon

b)

Nitrogen

c)

Noble Gases

d)

Oxygen

40.

Oxygen is not reactive or diatomic.

a)

True

b)

False

41.

What does halogens mean?

a)

Salt destroying

b)

Pepper forming

c)

Salt forming

d)

Pepper destroying

42.

All of halogens are very reactive.

a)

True

b)

False

43.

Noble Gases are ---

a)

reactive

b)

nonreactive

c)

fast

d)

slow

44.

What is the simplest atom?

a)

Hydrogen

b)

Noble Gas

c)

Metalloids

d)

Oxygen

45.

All metalloids are solids at room temperature.

a)

True

b)

False

46.

The conductivity of a metalloid depends on... (there are 3 answers)

a)

exposure to light

b)

temperature

c)

presence of impurities

d)

electricity

47.

the atomic nuclei of radioactive isotopes release fast-moving particles and energy in what process?

a)

nuclear reactions

b)

radioactive decay

c)

gamma lights

d)

alpha particle

48.

process where an atom's nuclei split apart

a)

Nuclear fission

b)

Nuclear fusion

49.

process in which atomic nuclei join together

a)

nuclear fusion

b)

nuclear fission

50.

Nuclear fission and fusion are examples of

a)

Nuclear reaction

b)

Radioactive Decay

c)

Alpha Particle

d)

Beta Particle

51.

Who accidentally discovered the effects of radioactive decay?

a)

Thomson

b)

Mendeleev

c)

Henri

d)

Bohr

52.

to spontaneously emit radiation

a)

Radioactivity

b)

Alpha particles

c)

Beta particles

d)

Gamma rays

53.

Radioactive Decay produces.. (there are 3 answers)

a)

alpha particles

b)

radioactivity

c)

beta particles

d)

gamma rays

54.

loses 2 protons and 2 neutrons, positively charged

a)

Alpha Particles

b)

Beta Particles

c)

Radioactive Decay

d)

Gamma Rays

55.

fast moving electron given off by a nucleus

a)

beta particle

b)

alpha particle

c)

gamma rays

d)

none of the above

56.

consists of high energy waves, similar to x rays

a)

beta particle

b)

alpha particle

c)

gamma rays

d)

radioactivity

57.

Which one is the most penetrating of the options below?

a)

Alpha

b)

Beta

c)

Gamma radiation

58.

Democritus proposed that matter was formed of -- pieces that could not be cut into smaller parts

a)

large

b)

small

c)

medium

d)

uneven

59.

Atomos means

a)

Cuttable

b)

Uncuttable

c)

Lovable

d)

Unlovable

60.

An atom is considered an element

a)

True

b)

False

61.

What did Dalton think atoms were like?

a)

Rough, hard balls that could be broken into smaller pieces

b)

Smooth, soft balls that could be broken into smaller pieces

c)

Smooth, hard balls that cannot be broken into smaller pieces

d)

Rough, soft balls that cannot be broken into smaller pieces

62.

Who discovered electrons?

a)

Rutherford

b)

Dalton

c)

Bohr

d)

Thomson

63.

What did Thomson reasoned with?

a)

atoms must have a positive charge that balances with negative charge

b)

Atoms must not have a positive charge

c)

Atoms only have negative charge

d)

Atoms had no charge at all

64.

Who found evidence that challenged Thomson's model?

a)

Rutherford

b)

Dalton

c)

Bohrs

d)

Democritus

65.

Based on Rutherford's experiment, he suggested that

a)

Atoms were mostly empty space but with a positive charge at center

b)

Atoms were mostly empty space but with a negative charge at center

c)

Atoms had a nucleus at its center

d)

Electrons orbited like the planets

66.

Where did the atom's positive charge be packed within?

a)

Nucleus

b)

Protons

c)

Neutrons

d)

Electron

67.

Who suggested that electrons move in specific orbit around the nucleus of an atom?

a)

Thomson

b)

Bohr

c)

Rutherford

d)

Dalton

68.

Later it was proven that electrons DO orbit the nucleus like planets

a)

True

b)

False

69.

An electron's movemneti s related to its

a)

Mass

b)

Volume

c)

Energy level

d)

Protons

70.

Mose of an atom's volume is the space in which the -- move

a)

Electron

b)

Proton

c)

Neutron

d)

Its volume depends on the space it takes up

71.

What does the nucleus of an atom contain?

a)

Protons & Electrons

b)

Electrons & Neutron

c)

Protons & Neutrons

d)

It was empty space

72.

A proton has a charge of

a)

+

b)

-

c)

0

d)

e-

73.

An electron has a charge of

a)

*

b)

0

c)

e-

d)

No charge

74.

A neutron has a charge of

a)

+

b)

-

c)

e-

d)

0

75.

A proton and neutron are equal in mass

a)

True

b)

False

76.

Proton and neutron has a mass equal to -- amu

a)

1

b)

2

c)

4

d)

3

77.

number of protons in nucleus of an atom

a)

Atomic mass

b)

Atomic number

c)

Mass number

d)

Isotopes

78.

atoms with same s=number of protons and different numbers of neutrons

a)

Mass number

b)

Atomic Number

c)

Atomic theory

d)

Isotopes

79.

How is an isotope identified?

a)

Atomic number

b)

Atomic Theory

c)

Atomic mass

d)

Mass number

80.

average mass of all the isotopes of certain element

a)

Atomic mass

b)

Atomic theory

c)

Atomic number

d)

Atomic bomb

81.

Who made the periodic table?

a)

Mendeleev

b)

Dalton

c)

Thomson

d)

Bohr

82.

By 1869, a total of - elements were discovered

a)

63

b)

73

c)

65

d)

78

83.

an arrangement of elements showing the repeating pattern of their properties

a)

periodic mass

b)

atomic theory

c)

periodic table

d)

chemical symbol

84.

How are modern periodic tables arranged?

a)

increasing atomic number

b)

decreasing atomic number

c)

different atomic mass

d)

same atomic mass

85.

Share the properties of both metals and nonmetals

a)

Metalloids

b)

Actinides

c)

Lanthanides

d)

Manganese

86.

arranged in rows

a)

Periods

b)

Group

c)

team

d)

Family

87.

elements in column

a)

group

b)

family

c)

periods

d)

metalloids

88.

What is matter?

a)

anything that is alive

b)

anything that is dead

c)

anything that has mass and takes up space

d)

anything that has color

89.

The study of matter and how matter changes

a)

Chemistry

b)

Psychology

c)

Science

d)

Maternity

90.

A substance is a single kind of matter that is --.

a)

Clean

b)

Dirty

c)

Pure

d)

None of the Above

91.

Pure water is always the same, whether it comes from a glacier or from a geyser. True or False?

a)

True

b)

False

92.

What two properties does every form of matter have?

a)

Chemical & Copper

b)

Chemical & Physical

c)

Physical & Chemistry

d)

None of the Above

93.

A chemical property describes the ability to change into -- substances.

a)

Pure

b)

Heterogeneous

c)

Homogeneous

d)

Different

94.

What is an element?

a)

a substance that cannot be broken down into other substances by chemical or physical means

b)

a substance that can be broken down into other substances by chemical or physical means

95.

Atom + Atom =

a)

Molecule

b)

Atom

c)

Chemistry

d)

Compound

96.

How is a chemical bond formed?

a)

When molecules combine

b)

When a compound is made

c)

When atoms combine

d)

When a chemical formula is included

97.

How is compound made?

a)

when two or more elements that are chemically combined

b)

when two or more atoms are held together by a chemical bond

c)

when two or more molecules combine

98.

What are the two types of mixtures?

a)

Heterogeneous & Chemical change

b)

Physical change & Chemical change

c)

Heterogeneous & Homogeneous

d)

Physical change & Homogeneous

99.

Heterogeneous is when everything is so evenly mixed that you can't see the different parts.

a)

True

b)

False

100.

What are the methods used to separate the parts of a mixture?

a)

Distillation, evaporation, filtration

b)

Distillation, magnetic attraction, filtration

c)

Distillation, magnetic attraction, filtration, evaporation

101.

What is the difference between weight and mass?

a)

Weight changes, mass does not

b)

Mass changes, weight does not

c)

Both changes

d)

Both do not change

102.

What is the SI unit of mass?

a)

cm^3

b)

m^3

c)

lbs

d)

kg

103.

The amount of space that matter occupies is its

a)

mass

b)

volume

c)

weight

d)

unit

104.

What is the SI unit of volume?

a)

cm^3

b)

kg

c)

m^3

d)

mL

105.

a measure of the mass of a material in a given volume

a)

Volume

b)

Mass

c)

Weight

d)

Density

106.

Objects with lesser density will sink.

a)

True

b)

False

107.

A substance that undergoes a chemical change is still the same substance.

a)

True

b)

False

108.

Dissolving is a physical change.

a)

True

b)

False

109.

A change in matter that produce one or more new substances

a)

Physical change

b)

Chemical Change

c)

Bending

d)

Dissolving

110.

states that matter is not created or destroyed in any chemical or physical change

a)

Law of Conservation of Mass

b)

International System of Units

c)

Chemical Change

d)

Physical Change

111.

Every chemical and physical change in matter includes a change in ---.

a)

Volume

b)

Density

c)

Mass

d)

Energy

112.

Energy can be created and destroyed?

a)

False

b)

True

113.

related to the energy of motion of the particles of matter

a)

Thermal Energy

b)

Chemical Formula

c)

Temperature

d)

Endothermic change

114.

the total energy of the motion of all of the particles in an object

a)

Temperature

b)

Thermal energy

c)

Endothermic Change

d)

Exothermic change

115.

Thermal energy naturally flows from warmer matter to cooler matter

a)

True

b)

False

116.

What is often released or absorbed when matter changes?

a)

Temperature

b)

Thermal Energy

c)

Endothermic Change

d)

Exothermic Change

117.

The melting of ice is an example of

a)

Endothermic Change

b)

Exothermic Change

118.

Combustio is a -- change that releases e energy and light.

a)

physical

b)

chemical

c)

endothermic

d)

exothermic

119.

chemical bond formed when 2 atoms SHARE electrons

a)

Metallic Bond

b)

Molecule

c)

Covalent Bond

d)

Chemical Bond

120.

Covalent bonds usually form between -- metals

a)

nonmetals

b)

metals

121.

Ionic bonds normally form when a metal combines with a

a)

another metal

b)

nonmetal

c)

lanthaniads

d)

sodium

122.

Nonmetals can bond to other nonmetals by --- electrons

a)

losing

b)

gaining

c)

sharing

d)

embracing

123.

how many types of bonds can atoms form?

a)

3

b)

1

c)

10

d)

18

124.

molecular compounds DO conduct electric current when melted or dissolved

a)

true

b)

false

125.

compared to ionic bonds, molecular compounds generally have -- melting points and boiling points

a)

lower

b)

higher

126.

As liquids, molecular compounds are good conductors.

a)

true

b)

false

127.

the forces between molecules are much -- than the forces between ions

a)

weaker

b)

stronger

128.

unequal sharing of electrons causes covalently bonded atoms to have a slight --- charges

a)

negative

b)

positive

c)

electric

d)

heat

129.

If 2 atoms pull equally on the electrons, ------

a)

neither atom becomes charged

b)

one becomes positive

c)

one becomes negative

d)

one is not charged

130.

covalent bond where electrons are shared equally

a)

nonpolar

b)

polar

131.

covalent bond where electrons are shared unequally

a)

nonpolar

b)

polar

132.

when electrons are shared unequally, the atom with the stronger pull gains a slightly -- charge

a)

negative

b)

positive

133.

the arom with the weaker pull gains a slightly -- charge

a)

positive

b)

negative

134.

Molecule is polar when it has a -- charged end and a negatively charged end

a)

positively

b)

negatively

c)

electrically

d)

musically

135.

when 2 oxygen atoms pull with equal strength in opposite directions, the attraction is canceled out and the molecule becomes NONPOLAR

a)

true

b)

false

136.

WEAK attractions between their slight negative and slight positive charges (polar)

a)

Schindler Forces

b)

Van der Waals forces

c)

Windle Force

d)

Van forces

137.

Van der Waals forces pull water molecules

a)

apart

b)

away

c)

towards each other

d)

combined

138.

attraction between the polar water molecules requires LESS energy than the attraction between nonpolar oxygen molecules

a)

true

b)

false

139.

attraction between positive metal ion and the electrons surrounding it

a)

chemical bond

b)

physical bond

c)

molecular bond

d)

metallic bond

140.

Metal crystals --

a)

loses electrons easily

b)

gains electrons easily

c)

is neutral

d)

has no charge

141.

a mixture made of two or more elements, at least one of which is a metal

a)

Alone

b)

Alloy

c)

Ion

d)

Science

142.

Metal crystals is composed of closely packed POSITIVELY charged ions

a)

true

b)

false

143.

Alloys are generally --- and less reactive than the pure metals they are made from

a)

stronger

b)

weaker

c)

the same

d)

comparable

144.

observable, does not change

a)

Physical Property

b)

Chemical Property

145.

substances that undergo chemical changes

a)

Reactants

b)

Products

c)

Yield

d)

Subscript

146.

a solid that forms from liquids during a chemical reaction

a)

Precipitate

b)

Color Change

c)

Gas Production

d)

Evaporation

147.

Gas production is possible evidence that a chemical reaction has occur.

a)

True

b)

False

148.

Forming bonds --- energy

a)

bonds

b)

changes

c)

releases

d)

requires

149.

What is an exothermic reaction?

a)

the energy released as the products form is less than the energy required to break the bond

b)

the energy released as the products form is greater than the energy required to break the bond

c)

the energy released as the products form is equal to the energy required to break the bond

150.

endothermic reaction is...

a)

less energy is required to break the bonds of the reactants than is released by the formation of the products

b)

more energy is required to break the bonds of the reactants than is released by the formation of the products

c)

no energy is required to break the bonds of the reactants

d)

the same amount of energy is required to break the bonds of the reactants than is released by the formation of the products

151.

on the left side of a chemical equation is

a)

reactants

b)

products

152.

on the right side of a chemical equation is

a)

products

b)

reactants

153.

the arrows between a chemical equation is said as

a)

equals to

b)

reacts to form

c)

yields

d)

makes

154.

Who made the Law of Conservation?

a)

Antione Lavoisier

b)

Swchann

c)

Mendeleev

d)

Bohr

155.

People said this went against the Law of Conservation of Mass

a)

Open System

b)

Closed System

c)

Chemical Reaction

d)

Physical change

156.

THe pricniple of conservation of mass means

a)

total number of atoms in reactants > total number atoms in products

b)

total number of atoms in reactants < total number atoms in products

c)

total number of atoms in reactants = total number atoms in products

157.

when two or more elements/compounds combine to make a more complex substance

a)

Synthesis

b)

Decomposition

c)

Replacement

158.

compounds break down into simpler products

a)

Synthesis

b)

Decomposition

c)

Replacement

159.

when one element replaces another in a compound or trade places

a)

Synthesis

b)

Decomposition

c)

Replacement

160.

What do you use to balance a chemical equation?

a)

subscripts

b)

coefficient

c)

luck

d)

elements

161.

needed to start a chemical reaction; helps break chemical bonds and form new bonds

a)

Activation Energy

b)

Temperature

c)

Concentration

d)

Surface Area

162.

increase of particles being exposed to the reaction

a)

Temperature

b)

Concentration

c)

Surface Area

d)

Enzymes

163.

Heating allows particles to ---

a)

move slower

b)

move faster

c)

stay the same

d)

disappear

164.

increases the reaction rate by lowering activation energy

a)

Surface Area

b)

Temperature

c)

Concentration

d)

Catalyst

165.

decreases the rate of chemical reaction

a)

Inhibitor

b)

Enzymes

c)

Concentration

d)

Catalyst

166.

Catalyst are reactants

a)

True

b)

False

167.

Catalyst are NOT permanently changed

a)

True

b)

False

168.

Chemicals reactions using enzymes require

a)

less activation energy and can happen at higher temperature

b)

more activation energy and can happen at higher temperature

c)

less activation energy and can happen at lower temperature

d)

more activation energy and can happen at lower temperature

169.

Freezing is

a)

exothermic

b)

endothermic

170.

Condensation is

a)

exothermic

b)

endothermic

171.

Boiling is

a)

exothermic

b)

endothermic

172.

In exothermic reactions, the surrounding

a)

gets hotter

b)

gets colder

c)

stays the same

d)

is destroyed

173.

In endothermic reactions, the surrounding

a)

stays the same

b)

is destroyed

c)

gets hotter

d)

gets colder

174.

In exothermic reactions, the products have --- energy than the reactants

a)

more

b)

less

c)

the same

175.

In endothermic reaction, the products have --- energy than the reactants

a)

more

b)

less

c)

the same

176.

According to Boyle's law, the volume of a gas increases when its

a)

pressure decreases

b)

pressure increases

c)

temperature falls

d)

temperature rises

177.

---- isotopes are radioactive

a)

unstable

b)

stable

c)

high

d)

low

178.

Charles' law states that when temp. increases, volume --

a)

increases

b)

decreases

c)

stays the same

179.

reg pattern, melt at a specific temp

a)

Amorphous

b)

Crystalline

180.

irregular pattern, does not melt at a specific temperature

a)

Amorphous

b)

Crystalline

181.

solid have a

a)

definite shape and volume

b)

indefinite shape and definite volume

c)

indefinite shape and volume

d)

definite shape and indefinite volume

182.

liquid has a

a)

definite shape and volume

b)

definite shape,indefinite volume

c)

indefinite shape, definite volume

d)

indefinite shape and volume

183.

liquid resistance

a)

viscosity

b)

corrosion

c)

shape

d)

nitrogen fixation

184.

pressure is

a)

area / force

b)

area / area

c)

force / area

d)

force / force

185.

higher pressure =

a)

higher concentration

b)

lower concentration

c)

higher temp

d)

lower temp

186.

Gas particles have

a)

the most thermal energy

b)

the least amount of thermal energy

c)

fixed particles

187.

What happens to the thermal energy during sublimation?

a)

it decreases

b)

it increases

c)

it stays the same

188.

What occurs at the surface of a substance?

a)

evaporation

b)

sublimation

c)

condensation

d)

boiling

189.

Mass number =

a)

proton + electron

b)

electron + neutron

c)

neutron + proton

190.

What is used to determine the age of fossils?

a)

tracers

b)

radioactive decay

c)

radioactive dating

d)

half-lives

191.

The thermal energy in liquids is

a)

lower than that of a solid

b)

higher than that of a solid

192.

Only covalently bonded atoms can form molecular compounds

a)

True

b)

False