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U2L1E1&2 Chemistry and Water

Total questions: 66

Worksheet time: 49mins

Name
Class
Date
1.
The chemical compound of water is
a)
HO
b)
H2O
c)
H3O
d)
HO2
2.
Pure water has a
a)
Neutral pH 
b)
Negative pH
c)
Positive pH
d)
Both Negative and Positive pH
3.
A Compound that is being dissolved is called a
a)
Solution
b)
Solute
c)
Solvent
d)
Suspension
4.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
5.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
6.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
7.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
8.
Acids have more what? 
a)
OH ions 
b)
OH- ions
c)
H+ ions 
d)
All of the above 
9.

A water molecule is held together by this type of bond

a)

Ionic

b)

Non polar covalent

c)

Hydrogen

d)

Polar covalent

10.

Protons have ___.

Electrons have ___.

Neutrons have ___.

a)

a positive charge, a negative charge, no charge

b)

a negative charge, no charge, a positive charge

c)

no charge, a positive charge, a negative charge

d)

a positive charge, no charge, a negative charge

11.

___ bonds are formed through the sharing of electrons while ___ bonds are formed through the transfer of electrons.

a)

covalent, ionic

b)

ionic, covalent

c)

covalent, hydrogen,

d)

hydrogen, ionic

12.

___ molecules are formed from the uneven sharing of electrons that results in a molecules with an area of slight positive charge and an area of slight negative charge.

a)

Polar

b)

Ionic

c)

Covalent

d)

Nonpolar

13.

Weak ___ bonds form between water molecules because of water's property of polarity.

a)

hydrogen

b)

covalent

c)

ionic

d)

liquid

14.

Ice is __ dense compared to water (liquid), meaning that ice in water will ___.

a)

less, float

b)

more, float

c)

less, sink

d)

more, sink

15.

Water has a high ____, which is where water resists changes temperature.

a)

heat capacity

b)

boiling point

c)

freezing point

d)

adhesion

16.

Water is attracted to other water molecules, this property is known as ___.

a)

cohesion

b)

adhesion

c)

heat capacity

d)

capillary action

17.

Water is attracted to other substances that are not water, like water attracted to glass. This property is known as ___.

a)

adhesion

b)

cohesion

c)

heat capacity

d)

capillary action

18.

___ is the phenomenon where water is drawn up a thin tube.

a)

capillary action

b)

cohesion

c)

adhesion

d)

plant pulling

19.

Solutions with a high pH (above a 7) are ___.

a)

bases

b)

acids

c)

neutrals

20.

Solutions with a LOW pH (below a 7) are ___.

a)

acids

b)

bases

c)

neutrals

21.

To make a solution, a ___ is dissolved into a liquid called a ___.

a)

solute; solvent

b)

solvent; solute

c)

salt; liquid

d)

solution; mixture

22.

When the temperature on Earth drops abruptly, the land cools down faster than the sea.

Which property of water allows water to be resistant to sudden temperature changes?

a)

Density

b)

Adhesion

c)

High specific heat capacity

d)

Surface tension

23.

Water has a boiling point of 100.0∘C, which is unusually high compared to many other liquids.

Which of the following properties allows water to have a high boiling point?

a)

It contains only three atoms.

b)

It is a small, covalent molecule.

c)

It contains oxygen.

d)

It can form hydrogen bonds.

24.

The air temperature ranges of several Southern California cities in August are shown in the table below.

Which of the following best explains why coastal cities like San Diego often have a smaller air temperature range than inland cities?

a)

The cohesive tendency of water molecules causes high surface tension, so heat is unable to penetrate the top layer of the ocean and escape into the air.

b)

The high heat capacity of water allows the ocean to moderate the temperature of nearby air and land.

c)

The adhesive properties of ocean water allow the water molecules to stick to one another, preventing temperature change of the air above it.

d)

Because water is less dense as a solid than as a liquid, it easily vaporizes, causing excess heat to escape into the air near coastal cities.

25.

Which of the following shows the most likely way that two water molecules will bond with each other?

a)
b)
c)
d)
26.

Which of the following observations could be best explained by water’s high surface tension?

a)

A human sweats in order to cool down.

b)

A leaf floats on the surface of a puddle.

c)

A local pond is slow to freeze, despite low air temperature.

d)

A tree takes up water from its roots.

27.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
28.

As you add drops of water to the surface of a coin, each drop sticks to the other water droplet because of ________________, and sticks to the penny because of ______________.

a)

adhesion, cohesion

b)

cohesion, adhesion

c)

capillary action, specific heat

d)

specific heat, capillary action

29.

Which of the following types of bonds transfers an electron between atoms?

a)

covalent bond

b)

hydrogen bond

c)

hydrophobic bond

d)

ionic bond

30.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
31.

Water and oil are placed in the same vessel and stirred. The reason that oil and water will not mix is because -

a)

water is nonpolar and oil is polar

b)

both water and oil are nonpolar

c)

both water and oil are polar

d)

water is polar and oil is nonpolar

32.

What substance do scientists seek in the universe to determine if there is life elsewhere?

a)

carbon dioxide

b)

water

c)

oxygen

d)

ozone

33.

hydrophobic substances...

a)

do not dissolve in water (ex. oil in water)

b)

do dissolve in water (ex. sugar in water)

34.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
35.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
36.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
37.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
38.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
39.
An atoms overall charge is 
a)
positive 
b)
depends on its mood 
c)
neutral 
d)
negative 
40.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
41.
An atom's mass number equals the number of...
a)
protons plus the number of electrons
b)
protons plus the number of neutrons
c)
protons
d)
neutrons
42.
Which statement about the atomic nucleus is correct?
a)
The nucleus is made of protons and neutrons and has a negative charge
b)
The nucleus is made of protons and neutrons and has a positive charge
c)
The nucleus is made of electrons and has a positive charge
d)
The nucleus is made of electrons and has a negative charge
43.
Atoms have no electric charge because they...
a)
have an equal number of charged and non charged particles
b)
have neutrons in their nuclei
c)
have an equal number of electrons and protons
d)
have an equal number of neutrons and protons
44.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
45.

What does the 1.00794 stand for?

a)

Hydrogen

b)

atomic number

c)

atomic mass

d)

atomic explosion

46.
Changing which sub-atomic particle changes the element?
a)
proton
b)
neutron
c)
electron
47.
a)
2
b)
8
c)
3
d)
13
48.
Valence electrons are the...
a)
Innermost electrons
b)
Middle electrons
c)
Outermost electrons
d)
Any electrons
49.

How many valence electrons does carbon have?

a)

4

b)

5

c)

6

d)

7

50.

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

a)

1

b)

2

c)

3

d)

4

51.

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

a)

31

b)

5

c)

15

d)

4

52.

USE THE PERIODIC TABLE

Find the element that has 3 Valence Electrons and 2 energy levels.

a)

Magnesium - Mg

b)

Lithium - Li

c)

Aluminum - Al

d)

Boron - B

53.
Elements in the same column of the periodic table always have the same # of _______ as one another.
a)
Protons
b)
Neutrons
c)
Electrons
d)
Valence Electrons
54.

How many valence electrons does Helium Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

55.

How many valence electrons does Hydrogen Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

56.

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

57.

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

a)

1

b)

2

c)

8

d)

18

58.
A charged particle that has gained or lost electrons is called a _____.
a)
molecule
b)
ion
c)
isotope
d)
element
59.
What kind of chemical bond forms between a metal and a nonmetal?
a)
ionic
b)
covalent
c)
fake
d)
metallic
60.
What kind of bond forms between two nonmetals?
a)
ionic 
b)
covalent
c)
metallic
d)
fake
61.
What kind of bond forms when atoms share electrons?
a)
ionic
b)
covalent
c)
artificial
d)
univalent
62.
What kind of bond forms when atoms exchange electrons?
a)
ionic
b)
covalent
c)
artificial
d)
univalent
63.
If an atom loses two electrons what charge will it have?
a)
-2
b)
-1
c)
+1
d)
+2
64.
If an atom gains two electrons what charge will it have?
a)
-2
b)
-1
c)
+1
d)
+2
65.
If an atom has 7 protons and 7 electrons what charge will it have?
a)
-2
b)
-1
c)
0
d)
+2
66.
Predict the bond that will form between Be and F.
a)
Ionic
b)
Covalent

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