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Unit 4 Review

Total questions: 63

Worksheet time: 43mins

Name
Class
Date
1.
How many valence electrons does chlorine (Cl) have?
a)
2
b)
5
c)
6
d)
7
2.
How many valence electrons does carbon (C) have?
a)
3
b)
4
c)
5
d)
6
3.
Which of these elements has 8 valence electrons?
a)
P
b)
Be
c)
O
d)
Ar
4.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
5.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
6.
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
7.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
8.
This could be the dot diagram of
a)
O
b)
B
c)
Li
d)
Ne
9.
This could be the dot diagram of
a)
Be
b)
B
c)
C
d)
Ne
10.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
11.
What element's don't have oxidation numbers?
a)
alkali metals
b)
noble gases
c)
halogens
d)
alkaline earth metals
12.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
13.
What is the oxidation number for Flourine (F)?
a)
+1 
b)
-1
c)
17
d)
7
14.
All the elements in group 13 would have an oxidation number of ..
a)
+3
b)
-3
c)
0
15.
When naming an ionic compound with a ______ metal needs a Roman Numeral after its name.
a)
Alkali
b)
Alkaline-Earth
c)
Transition 
d)
Metalloid
16.
A anion will be a ____ ion.
a)
negative
b)
positive
17.
A cation is a ____ ion.
a)
negative
b)
positive
18.
K +  and  N-3
a)
KN
b)
KN3
c)
K3N3
d)
K3N
19.
Name the following compound: MgO  
a)
Magnesium 
b)
Magnesium Oxide
c)
Magnesium Oxygen
d)
Magnesium Oxate
20.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
21.
The majority of an atom's mass exists where?
a)
In the nucleus
b)
In the electron cloud
c)
In the space between the nucleus and the electrons
d)
In the neutrons
22.
?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
23.
?
a)
Beryllium
b)
Boron
c)
Barium
d)
Bromine
24.
Rows on the period table are called _____ while columns are called _____.
a)
groups, families
b)
groups, periods
c)
periods, groups
d)
families, groups
25.
How are electrons arranged in an atom?
a)
In groups of five
b)
In energy levels
c)
By color
d)
By shape
26.
What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!
a)
noble gases
b)
transition
c)
halogens
d)
borons
27.
What does an atom's group tell us?
a)
Number of protons
b)
Number of electrons
c)
Number of valence electrons
d)
Number of shells
28.
How many electron shells/levels does this atom have?
a)
1
b)
2
c)
3
d)
4
29.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
30.
Is Hydrogen considered a metal or a non-metal?
a)
Metal
b)
Non-metal
31.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
32.
What region of the periodic table contains atoms that form covalent bonds?
a)
the left side
b)
the middle
c)
the right side
d)
top left
33.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
34.
How many electrons are shared in a single bond?
a)
0
b)
4
c)
2
d)
1
35.
Why do Hydrogen and Helium only need two valence electrons?
a)
The first electron shell can only hold two electrons.
b)
They are both metals.
c)
They both begin with H.
d)
They are both gases.
36.
Because an atom is neutral, the number of
a)
electrons equals the number of protons
b)
protons equals the number of neutrons
c)
isotopes equals the number of electrons
d)
electrons equals the number of neutrons 
37.
All of the following are true of an ionic bond
a)
forms when one atom transfers electrons to another 
b)
is held together due to opposite charges
c)
occurs when atoms share electrons
d)
is the type of bond that hold NaCl together
38.

Electrons involved in bonding between atoms are

a)

positively charged

b)

valence elections

c)

inside the nucleus

d)

closest to the nucleus

39.

What is a double bond?

a)

a bond between two atoms

b)

one pair of electrons shared between two atoms

c)

two pairs of elections shared between two atoms

d)

two pairs of electrons shared between four atoms

40.

The chemical name for the compound with the formula Na2S is

a)

Sodium fluoride

b)

magnesium sulfide

c)

lithium oxide

d)

sodium sulfide

41.

In the chemical formula for an ionic compound, which item is written first?

a)

the name of the positive ion

b)

the name of the negative ion

c)

the subscripts

d)

the charges

42.

Magnesium Bromide is an ionic compound with the chemical formula MgBr2. What does the "2" tell you?

a)

Bromide has a 2+ charge

b)

There are two bromide ions for every magnesium ion

c)

There are two magnesium ions to every bromide ion

d)

Bromide has a 2- chage

43.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

44.

A mixture made of two or more elements, at least one of which is a metal is called a(n)

a)

alloy

b)

complex metal

c)

metallic bond

d)

superconductor

45.

Which of the following terms means that metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes

a)

polar

b)

alloy

c)

ductile

d)

malleable

46.

Which of the following groups contains the most reactive elements?

a)

the noble gases

b)

the alkali metals

c)

the alkaline earth metals

d)

the carbon family

47.

Ionic compounds that dissolve in water conduct electricity because they break into _______ that move freely.

a)

ions

b)

particles

c)

electrons

d)

polar bonds

48.

A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving

a)

neutrons

b)

ions

c)

valence electrons

d)

atoms

49.

Solid metals are good conductors of heat and _________

a)

cold

b)

electricity

c)

ions

d)

atoms

50.

Because the electrons in a molecule of hydrogen fluoride are more strongly pulled toward the fluorine atom, the molecule is

a)

non polar

b)

polar

c)

molecular

d)

ionic

51.

The properties of solid metals can be explained by the structure of and the bonding among the metal atoms.

a)

True

b)

False

52.

Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds.

a)

True

b)

False

53.

A nonpolar bond is formed when 2 atoms share electrons unequally

a)

True

b)

False

54.

When electrons are transferred between two atoms, a covalent bond is formed

a)

True

b)

False

55.
In the periodic table, the number of valence electrons in each element DECREASES from left to right across each period. 
a)
True
b)
False
56.
Phosphorous trichloride
a)
PCl3
b)
P3Cl
c)
P3Cl3
d)
PCL
57.
Naming a compound of two non-metals requires us to use..
a)
Prefixes
b)
Roman Numerals
c)
Nothing, just name it
58.
Which of these is covalent?
a)
NaCl
b)
Pb(NO3)2
c)
CO2
d)
AlCl3
59.
Bromine monoflouride
a)
Br1F1
b)
BrF
c)
Br2F
d)
BrF2
60.
Name the prefix associate with:
7
a)
septa
b)
hexa
c)
octa
d)
hepta
61.
Ionic or covalent?
Na  F
a)
Ionic
b)
Covalent
62.
Which of these compounds is ionic? 
a)
Carbon dioxide
b)
Dinitrogen trioxide
c)
Silicon tetrachloride
d)
Lithium bromide
63.
Name this formula: 
Fe3PO4
a)
Iron Phosphide
b)
Iron (III) Phosphide
c)
Iron (I) Phosphate
d)
Iron Phosphate

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