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After Christmas review

Total questions: 67

Worksheet time: 50mins

Name
Class
Date
1.

What is the oxidation number on the nitrogen in NO?

a)

0

b)

-1

c)

-2

d)

+2

2.

Which of the following has an oxidation number of zero on the chlorine atom?

a)

NaCl

b)

Cl2

c)

Cl-

d)

ClO3-

3.

What is reduced in the reaction below?

Na + PbCl2 → Pb + NaCl

a)

Na

b)

Pb

c)

Na+1

d)

Pb2+

4.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

5.
Which statement is true:
Mg → Mg2+ + 2e–
a)
Mg gains 2 electrons
b)
Mg2+ loses 2 electrons
c)
Mg loses 1 electron
d)
Mg loses 2 electrons
6.
Which of the following half reactions correctly represents a reduction half reaction?
a)
Fe →Fe2+ + 2e-
b)
Pb4+ + 2e- →Pb2+
c)
2O-2 →O2 + 4e-
d)
Fe + 3e- →Fe3+
7.

What is the oxidation number of iodine in KIO3?

a)

0

b)

-1

c)

+5

d)

+1

8.

Which metal is most easily oxidized?

a)

Co

b)

Ag

c)

Cu

d)

Mg

9.

What is a half-reaction of this equation, Na + Cl --> NaCl ?

a)

Cl + e- --> Cl-

b)

Cl - e- --> Cl-

c)

Na --> Na + e-

d)

Na° + Cl°--> Na+1Cl-1

10.
What happens to Cr3+ ion when it is converted to CrO42–
a)
Oxidation number decreases and it undergo reduction
b)
Oxidation number decreases and it undergo oxidation
c)
Oxidation number increases and it undergo reduction
d)
Oxidation number increases and it undergo oxidation
11.
Which change is reduction?
a)
change 1
b)
change 2
c)
neither
12.
Which expression represents the oxidation of the copper(I) ion?
a)
Cu+---->  Cu2+ + e–  
b)
Cu ----> Cu+ + e– 
c)
Cu+ + e– ----> Cu0
d)
Cu+ + e– ----> Cu2+
13.
What element is being Reduced?
a)
N
b)
H
c)
O
d)
S
14.
What element is being Oxidized?
a)
N
b)
H
c)
O
d)
S
15.

Because electrons were emitted from a negative charge and attracted to a positive charge, it was understood that electrons have a ___ charge.

a)

neutral

b)

postive

c)

negative

d)

unknown

16.

In summary, Thomson's CRT experiment revealed that:

a)

A. electrons have mass & a negative charge

b)

B. there are subatomic particles that make up an atom

c)

C. atoms exist

d)

D. both A & B are correct

e)

E. A, B & C are correct

17.
The drawing above is Thomson’s ________.
a)
cathode ray tube experiment
b)
oil drop experiment
c)
gold foil experiment
18.
Who's model is this?
a)
Thomson
b)
Rutherford
c)
Democritus
d)
Bohr
19.

What was the major contribution of J.J. Thomson's model of the atom?

a)

Introduction of electrons

b)

Discovery of protons

c)
Development of the nuclear model of the atom
d)

Explanation of isotopes

20.

There are two different charges near each other they will...

a)

Attract

b)

Repel

c)

Become the same

d)

All of the above

21.

Mrs. Jensen rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

a)

The balloons will repel each other.

b)

The balloons will attract each other.

c)

The balloons will become positively (+) charged.

d)

The balloons will pop.

22.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
23.

What is static electricity caused by?

a)

A balance of power

b)

A balance of positive and negative charges

c)

An imbalance of positive and negative charges

d)

An imbalance of protons and neutrons

24.
An object becomes postiively charged when which of the following occurs?
a)
loses electrons
b)
gains electrons
c)
loses protons
d)
gains neutrons
25.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
26.
The girl's hair and the comb are attracting  one another.  The hair and the comb have
a)
opposite charges
b)
like charges
27.

Two objects with LIKE elecrical charges will

a)

attract each other

b)

even out in the end

c)

repel each other

d)

cause a spark

28.
Does this represent attraction or repulsion?
a)
attraction
b)
repulstion
29.
What material is a good conductor?
a)
copper
b)
wood
c)
rubber
d)
plastic
30.
What material is an insulator?
a)
coper
b)
silver
c)
gold
d)
plastic
31.
When a glass rod is rubbed with silk and the glass rod becomes positively charged, what happens to the electrons?
a)
they are removed from the rod
b)
they are added to the rod
32.
assume a rubber rod is rubbed against a rabbit fur and gains 5 electrons.  which of the following is true?
a)
The fur lost 5 electrons
b)
the fur gained 5 electrons
c)
the fur gained 5 protons
d)
The fur lost 2 electrons
33.
An atom loses an electron.  What type of charge does it have now?
a)
positive
b)
negative
34.
An atom gains an electron.  What type of charge does it have now?
a)
positive
b)
negative
c)
No charge
35.

Shiny (luster) and good conductors of electricity:

a)

Nonmetal

b)

Lightning

c)

Metal

d)

Semi-metal

36.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
37.

List 4 properties of metals

a)

conducts electricity, reacts with acid, malleable, shiny

b)

does not conduct electricity, reacts with acid, malleable, shiny

c)

conducts electricity, does not react with acid, malleable, shiny

d)

conducts electricity, reacts with acid, lusterous, shiny

38.

Which of the following are properties of nonmetals?

a)

brittle

b)

dull

c)

conducts electricity

d)

does not react with acid

e)

reacts with acid

39.

What type of element is in group 16 period 4?

a)

metal

b)

nonmetal

c)

metalloid

d)

noble gas

e)

none of these are correct

40.

Name the element that is a metalloid in period 3.

a)

Aluminum

b)

Silicon

c)

Phosphorus

d)

Scandium

e)

Germanium

41.

Which of the following elements would have properties similar to beryllium?

a)

Mg

b)

Na

c)

Ti

d)

Sr

e)

C

42.

A substance was found to conduct electricity, is malleable, is dull, and did not react with acid. What type of element is this?

a)

metal

b)

transition metal

c)

metalloid

d)

nonmetal

e)

alkali metal

43.

An element is shiny, conducts electricity, reacts with acid and is malleable. Where can it be found?

a)

Group 15 period 2

b)

Group 14 period 4

c)

Group 13 period 4

d)

Group 16 period 6

44.

Where would an element that is dull, does not react with acid, is brittle, and does not conduct belong on the periodic table?

a)

Period 3 group 16

b)

Period 4 group 2

c)

Period 4 group 14

d)

Period 2 group 18

45.

What are the vertical columns on the periodic table called?

a)

Divisions

b)

Friends

c)

Groups

d)

Periods

46.

What are the horizontal rows on the periodic table called?

a)

Periods

b)

Groups

c)

Families

d)

Divisions

47.

Most of the elements in the periodic table are classified as?

a)

Metalloids

b)

Nonmetals

c)

Transition Metals

d)

Metals

48.

NaB

a)

Polar Covalent

b)

Ionic

c)

Network

d)

Metallic

e)

Nonpolar Covalent

49.

NaCl

a)

Polar Covalent

b)

Ionic

c)

Network

d)

Metallic

e)

Nonpolar Covalent

50.

FeCs

a)

Polar Covalent

b)

Ionic

c)

Network

d)

Metallic

e)

Nonpolar Covalent

51.

What type of bond is present in H2O?

a)

Network

b)

Ionic

c)

Polar Covalent

d)

Metallic

e)

Nonpolar Covalent

52.

What type of bond is present in Cu?

a)

Polar Covalent

b)

Ionic

c)

Metallic

d)

Nonpolar Covalent

e)

Network

53.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
54.

The 3 types of chemical bonds are ________, ________, and ______. (Choose 3)

a)

ionic

b)

valence

c)

covalent

d)

metallic

e)

atomic

55.
If an atom gains two electrons what charge will it have?
a)
-2
b)
-1
c)
+1
d)
+2
56.

A bond between two nonmetal atoms is a __________ bond.

a)

ionic

b)

nuclear

c)

metallic

d)

covalent

57.

Which compound has high melting point?

a)

Ionic

b)

Covalent

58.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
59.

What happens when two oppositely charged ions are pushed together?

a)

they will repel (move apart)

b)

they will be attracted to each other (move together)

60.
What is a valence electron?
a)
The sum of neutrons and protons.
b)
The # of electrons in the last shell.
c)
A type of bond.
d)
A popular compound.
61.

Which of the following is true about Ionic Bonds? (select ALL TRUE options)

a)

High melting point

b)

Low melting point

c)

Can dissolve in water

d)

Cannot dissolve in water

e)

Can conduct electricity

62.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

63.

Is this molecule polar or non-polar?

a)

Non-polar

b)

Polar

64.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

65.

Look at this covalent molecule as a whole. What type of molecule is it? (Is it symmetrical?)

a)

Polar

b)

Nonpolar

c)

Ionic

66.

Electricity passes through a conductor because

a)

The voltage is up high enough on a power pack/battery

b)

Of the bound outer electrons which don't move from atom to atom

c)

Of the free outer electrons which move from atom to atom

d)

The nuclei are negatively charged meaning their movement through a wire generates current

67.

When different materials are rubbed together, electrons can be

a)

destroyed and broken down

b)

transferred from one material to the other

c)

transformed into a different atomic particle

d)

combined to form a different element

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