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Basic Chemistry and Properties of Water Review

Total questions: 57

Worksheet time: 29mins

Name
Class
Date
1.

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

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

2.

Which region of an atom has a negative charge?

a)

The nucleus

b)

Both nucleus and electron cloud

c)

The neutrons

d)

The electron cloud

3.

What is the smallest 'building block' of the elements that make up the universe?

a)

An atom

b)

An electron

c)

A proton

d)

A cell

4.

What type of bond is formed when atoms share electrons?

a)

Covalent

b)

Ionic

c)

Hydrogen

d)

Polyatomic

5.

A substance with a pH of 8 is a

a)

acid

b)

base

c)

neutral

6.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
7.
The symbol for Carbon is
a)
6
b)
12.011
c)
C
d)
Ca
8.
Beryllium has how many protons?
a)
4
b)
9.0122
c)
2
d)
13.0122
9.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
10.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
11.
An ionic bond forms when 
a)
Valence electrons are shared
b)
a sea of mobile electrons surround the cations
c)
valence electrons are transferred between atoms
d)
none of the above
12.
A positively or negatively charged particle.
a)
covalent bond
b)
compound
c)
ion
d)
chemical bond
13.
A chemical bond between oppositely charged ions.
a)
compound
b)
ion
c)
covalent bond
d)
ionic bond
14.

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

a)

Water is an acid.

b)

Water is a versatile solvent.

c)

Water has a high heat capacity.

15.

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.

16.

What two elements make up water?

a)

Helium and oxygen

b)

Hydrogen and oxygen

c)

oxygen and carbon

17.

Water is a universal solvent because it...

a)

It can be found anywhere

b)

It freezes when it gets cold

c)

Dissolves most substances

18.

The tightness across the surface of water that enables paper clips to float is ____________.

a)

adhesion

b)

capillary action

c)

surface tension

19.

Which statement explains why water molecules stick together?

a)

both sides are negative

b)

one side has a positive charge and the other side has a negative charge

c)

one side has a negative charge and the other side has a neutral charge

20.

What is the chemical formula for water?

a)

H20

b)

H2O

c)

H2O2

21.

What is adhesion?

a)

Water's ability to stick to itself

b)

Water's ability to stick to other substances

c)

The strength of the cohesion of all the water molecules combined

22.

What is cohesion?

a)

Water's ability to stick to itself

b)

Water's ability to stick to other substances

c)

The strength of the cohesion of all the water molecules combined

23.

These particles orbit around the nucleus of an atom. What are they called?

a)

electrons

b)

protons

c)

neutrons

24.

Neutral solutions have a pH of:

a)

0

b)

1

c)

7

d)

14

25.

Which is true?

a)

pH of less than 7 is basic; pH of more than 7 is acidic

b)

pH of less than 7 is acidic; pH of more than 7 is basic

26.

Attractions between water molecules are called

a)

Covalent bonds

b)

Ionic bonds

c)

Polar bonds

d)

Hydrogen bonds

27.

Why does ice float?

a)

As water freezes, it expands and its density decreases.

b)

As water freezes, it takes up more hydrogen from the atmosphere

c)

As water freezes, air becomes trapped between the water molecules.

d)

As water freezes, it takes up more oxygen from the atmosphere

28.

Why can water striders walk across the surface of water without falling through?

a)

They are light enough so they don't break the hydrogen bonds holding the water molecules together

b)

The insects actually use their wings to hover slightly above the water’s surface

c)

The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

d)

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

29.
True or false water is a polar molecule? 
a)
True 
b)
False 
30.

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

31.

Which term refers to water having a slightly positive and a slighty negative charge on its ends?

a)

cohesion

b)

surface tension

c)

polar

d)

adhesion

32.

Which end of the water molecule has a slightly negative charge?

a)

the oxygen end

b)

the hydrogen end

c)

both ends are slightly negative

d)

neither end is negative

33.

Why is water so good at dissolving so many substances?

a)

it is polar

b)

it is less dense as a solid

c)

cohesion

d)

adhesion

34.
Surface tension is caused by ...
a)
strong cohesion between water molecules
b)
strong adhesion between the water molecules
c)
condensation
d)
water cycle
35.

___ 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

36.

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

a)

capillary action

b)

cohesion

c)

adhesion

d)

plant pulling

37.

___ is a measure of the concentration of free hydrogen ions in a solution.

a)

pH

b)

polarity

c)

nonpolarity

d)

hydrogen bonding

38.

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

a)

acids

b)

bases

c)

neutrals

39.

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

a)

bases

b)

acids

c)

neutrals

40.

Solutions that are neutral have a pH

a)

equal to 7

b)

above 7

c)

below 7

41.
What is the atomic mass of an element?
a)
number of protons
b)
protons + neutrons
c)
protons + electrons
d)
protons - electrons
42.
What is the atomic number of an element?
a)
number of protons
b)
protons + neutrons
c)
protons + electrons
d)
protons - electrons
43.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons 
c)
The transfer of electrons
d)
None Of the above
44.
What is the atomic number?
a)
number of protons
b)
number of neutrons
45.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom 
46.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2 + __S --> __H2S
a)
1,1 --> 1
b)
2,2 --> 2
c)
1,2 --> 1
d)
1,2 --> 2
47.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H2O --> __NaOH + __H2
a)
2,2 --> 2,1
b)
4,4 --> 4,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
48.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
49.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
50.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
51.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
52.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
53.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
54.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
55.
Cations are...
a)
Positive
b)
Negative
c)
Neutral
d)
Purring
56.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
d)
Crying
57.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible

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