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Midterm Review Ch 7-8

Total questions: 40

Worksheet time: 42mins

Name
Class
Date
1.

What is the reason why Noble gases are so stable?

a)

They have an even number of electrons

b)

They have no electrons

c)

They have a full outer shell of electrons

d)

They bond with other atoms

2.

A covalent bond...

a)

is when electrons are transferred between atoms

b)

is when an electron is lost from an atom

c)

is when an electron is shared by 2 atoms

d)

is a shared pair of electrons between 2 atoms

3.

Which of these is not a covalent molecule?

a)

MgO

b)

CO2

c)

HCl

d)

CH4

4.
How many Valence Electrons are on Oxygen
a)
2
b)
7
c)
6
d)
1
5.
What is the name of this Molecule shape
a)
Tetrahedral
b)
Trigonal Pyramidal 
c)
Trigonal bipyramidal
d)
Bent
6.
A polar bond is one that
a)
Has an electronegativity difference greater than 0.7
b)
Has an electronegativity difference greater than 0.5
c)
Has an electronegativity difference less that 0.5
d)
Has an electronegativity difference less than 0.7
7.
What is a diatomic element?
a)
a metal bonded with a nonmetal
b)
2 or more nonmetals bonded together
c)
2 or more metals bonded together
d)
2 atoms of the same element bonded together
8.
How many electrons are shared in a double bond?
a)
2
b)
4
c)
6
d)
8
9.

Which formula is for phosphorus trichloride?

a)

KCl3

b)

PCl3

c)

K3Cl

d)

P3Cl

10.

Silicon dioxide is the compound in sand. What is its formula?

a)

SO2

b)

NaO2

c)

SiO2

d)

SiO

11.
What is the correct name for NO?
a)
Mononitrogen Monoxide
b)
Nitrogen Monoxide
c)
Mononitrogen Dioxide
d)
Nitrogen Oxide
12.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
13.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Trigonal planar
d)
Linear
14.
Choose the correct shape for this molecule:
a)
Tetrahedral
b)
Trigonal pyramidal
c)
Bent
d)
Trigonal planar
15.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Trigonal planar
16.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
17.
How many electrons should Oxygen have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
18.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
19.

The products of a reaction have the same ________as the reactants.

a)

molecule

b)

atoms

c)

subscripts

d)

coefficients

20.

When balancing this equation, Fe + Cl2 → FeCl3, the correct coefficient for Cl2?

a)

1

b)

2

c)

3

d)

4

21.

Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl

a)

3,1,3,1

b)

1,3,3,1

c)

1,1,1,3

d)

1,3,1,3

22.

Balance the following equation: Cr(s) + Fe(NO3)2 (ag) → Fe(s) + Cr(NO3)3 (ag)

a)

2,3,3,2

b)

2,3,2,3

c)

4,6,6,2

d)

1,3,3,1

23.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
24.
Name the part in red:

H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
25.
What precipitate forms when you mix lead (II) nitrate with sodium chloride?
a)
sodium nitrate 
b)
lead (II) chloride 
c)
sodium lead
d)
chloride nitrate 
26.
Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2?
a)
Ca2+(aq) +  2Cl- (aq) → CaCl(s)
b)
Ag+(aq)  +  Cl- (aq) → AgCl(s)
c)
Ag +  Cl  →  AgCl
d)
Ag+  +  Ca2+   →Ag2Ca (s)
27.
Which of the following does NOT form a precipitate?
a)
Pb(NO3)2(aq) + 2KI(aq) →
b)
Sr(NO3)2 (aq) + K2SO4(aq) →
c)
AgNO3(aq) + Na2S(aq) →
d)
 Pb(NO3)2(aq) + AgNO3(aq) →
28.
What are the spectator ions in the reaction of sodium chloride with silver nitrate?
a)
silver and nitrate
b)
sodium and chloride
c)
sodium and nitrate
d)
silver and chloride
29.

Which of the following reactions does NOT have a net ionic equation?

a)

C9H20 + O2 --> CO2 + H2O

b)

AgNO3 + CaCl2 --> AgCl + Ca(NO3)2

c)

NH4I + PbOH --> NH4OH + PbI2

d)

Fe(NO3)2 + KOH --> KNO3 + FeOH

30.

What type of reaction is this chemical equation: Cl2 + NaBr → NaCl + Br2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

31.

What type of reaction is this chemical equation: Na + Br2 → NaBr

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

32.

What type of reaction is this chemical equation: KClO3 → KCl + O2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

33.

What type of reaction is this chemical equation:

Mg + O2 → MgO

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

34.

What type of reaction is this chemical equation:

BaCl2 + Na2 SO4 → NaCl + BaSO4

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

35.

What type of reaction is this chemical equation:

HgO + Cl2 → HgCl + O2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

36.

Which of the following best describes why molecules have certain geometries

a)

The unshared pairs of electrons & the bonding pairs of electrons on the central atom are experiencing repulsive forces

b)

The unshared pairs of electrons & the bonding pairs of electrons on the central atom are experiencing attractive forces

c)

The unshared pairs of electrons & the bonding pairs of electrons on the largest atom are experiencing repulsive forces

d)

The bonding pairs of electrons on the atom with the most unshared pairs are experiencing repulsive forces

37.

What is the electron geometry of H2O?

a)

linear

b)

bent

c)

trigonal planar

d)

tetrahedral

38.

3 atoms bonded and 0 lone pairs

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

39.
The bond angle for a trigonal planar molecule is 
a)
90 Degrees
b)
109.5 Degrees
c)
120 Degrees
d)
180 Degrees
40.
Bond angle for tetrahedral
a)
120o
b)
109.5o
c)
104.5o
d)
107o

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