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chem 160 exam 2 review

Total questions: 44

Worksheet time: 24mins

Name
Class
Date
1.

High frequency waves have _________ wavelength.

a)

varying

b)

long

c)

the same

d)

short

2.

Planck's constant (h)=

a)

6.022 x 10^-34

b)

6.626 x 10^34

c)

6.626 x 10 ^-34

d)

6.022 x 10^34

3.

A radio station broadcasts at a frequency of 9.51 x 10^7 Hz. What is the wavelength of these waves?

a)

0.317 m

b)

3.15 m

c)

2.85 x 10^16 m

d)

need more information

4.

the emission spectrum for cesium depicts a line with a frequency of 3.45 x 10^14 Hz, what is the energy per photon of the line?

a)

8.69 x 10 ^-7 J

b)

2.29 x 10^-19 J

c)

1.92 x 10^-48 J

d)

need more information

5.

which of the following quantum numbers determines the distance of an electron from the nucleus

a)

l

b)

ml

c)

ms

d)

n

6.

the quantum number identified as ml determines what about an electron?

a)

shell number

b)

orientation of the orbital

c)

spin of the electron

d)

shape of the orbital

7.

what is the maximum number of electrons found in a p orbital

a)

6

b)

2

c)

12

d)

3

8.

which is the correct electron configuration for S^2-

a)

1s^2 2s^2 2p^6 3s^2 3p^4

b)

1s^2 2s^2 2p^6 3s^2 3p^6

c)

1s^2 2s^2 2p^6 3s^2 3p^2

d)

1s^2 2s^2 2p^6

9.

what neutral element has this electron configuration?

1s^2 2s^2 2p^6 3s^2 3p^2

a)

Si

b)

S

c)

P

d)

Al

10.

What element has this electron configuration?

s22s22p63s23p6

a)

Ar

b)

Ne

c)

Cl^-

d)

K+

11.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
12.
What atom matches this electron configuration?
[Xe] 6s2 4f14 5d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
13.
As you move down a group, atomic radius increases because - 
a)
you add more and more neutrons
b)
you add more and more protons
c)
you add more and more shells (energy levels)
d)
you add more atomic mass
14.
As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 
a)
the number of protons increases, so attraction to electrons increases
b)
the number of energy levels increases
c)
the number of electrons increases
d)
the atomic mass increases
15.
Electronegativity is...
a)
the ability of an atom to attract/ accept electrons
b)
the ability of an atom to lose electrons
c)
the energy required to remove an electron from a specific atom
d)
how easy it is to make friends. 
16.
Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.
a)
decreases, increases 
b)
increases, increases
c)
increases, decreases 
d)
stays the same, increases
17.
The atom with the largest atomic radius in Group 18 is - 
a)
Ar
b)
He
c)
Kr
d)
Rn
18.
Ionization energy is...
a)
the energy required to add an electron to a specific atom
b)
how much energy it takes to remove an electron from an atom
c)
the energy required to shield the outer electrons from the nucleus
d)
a measure of the ability of an atom to attract electrons
19.
Which of the following pairs of elements have similar properties
a)
Barium and Calcium
b)
Sodium and Magnesium
c)
Nickel and Copper
d)
Lithium and Helium 
20.

rank the following based on increasing 1st ionization energy: F, Li, N, Rb (from lowest to highest)

a)
Rb, N, F, Li
b)
N, F, Rb, Li
c)

Rb, Li, N, F

d)
F, N, Li, Rb
21.

rank the following based on increasing atomic radius: Mg, Rb, Cs, Ca

a)
Ca, Mg, Rb, Cs
b)

Mg, Ca, Rb, Cs

c)
Cs, Rb, Mg, Ca
d)
Mg, Rb, Cs, Ca
22.

Rank the atomic radii from lowest to highest: Na+, Ne, Mg2+, F-

a)

Na+, Mg2+, Ne, F-

b)

Mg2+, Na+, Ne, F-

c)

F-, Ne, Na+, Mg2+

d)

Ne, Na+, Mg2+, F-

23.

Element X is in period 3, has a charge of -1, and has the following Lewis dot structure, what is the identity of element X?

a)

S

b)

P

c)

Al

d)

Si

24.

Covalent bonds involve the transfer of electrons

a)

true

b)

false

25.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
26.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
27.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
28.

In HCN (Carbon is usually the central atom) what kind of bond is between the C and N

a)

Single

b)

Double

c)

Triple

29.

What is the formal charge on the oxygen atom at the top of this Lewis dot structure?

a)

0

b)

-1

c)

+1

d)

-3

30.
How many resonance structures for NO3- ion?
a)
1
b)
2
c)
3
d)
4
31.
How many resonance structures for CH3COO- ion?
a)
1
b)
2
c)
3
d)
4
32.

which of the following are ionic

a)

H3CO-

b)

MgCl2

c)

Na3PO4

d)

HOCl

33.
This is an example of a __________ bond.
a)
non-polar covalent
b)
polar covalent
c)
ionic
d)
metallic
34.
A diatomic molecule like O2 is always_______ because electrons are shared ________.
a)
nonpolar; equally
b)
polar; equally
c)
nonpolar; unequally
d)
nonpolar; unequally
35.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

36.

is this compound polar or nonpolar

K2SO3

a)

polar

b)

nonpolar

c)

both

d)

neither

37.

What is the chemical formula for dinitrogen monoxide?

a)

NO

b)

NO2

c)

N2O

d)

N2O2

38.

What is the name of (NH4)2SO3 ?

a)

Aluminum sulfite

b)

Ammonium sulfate

c)

Ammonium sulfite

d)

Ammonium II sulfate

39.

What is the chemical formula for Scandium III dichromate?

a)

Sc(Cr2O3)

b)

Sc3(Cr2O3)2

c)

Sc2(Cr2O3)3

d)

Sc2(Cr2O3)2

40.

What is the name of KMnO4 ?

a)

Potassium pernitrate

b)

Krypton permanganate

c)

Potassium permanganate

d)

Potassium nitride

41.

What is the chemical formula for Calcium chloride?

a)

CaCl

b)

CaCl3

c)

Ca2Cl

d)

CaCl2

42.

What is the name of MgI2 ?

a)

Magnesium iodide

b)

Manganese iodide

c)

Magnesium diiodide

d)

Manganese diiodide

43.

What is the chemical formula for Iron (II) phosphate?

a)

FePO4

b)

Fe3(PO4)2

c)

Fe2(PO4)3

d)

Fe2(PO2)4

44.

What is the name of P2O5 ?

a)

Phosphorous oxide

b)

Phosphorous (II) oxide

c)

Phosphorous (II) pentoxide

d)

Diphosphorous pentoxide

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