Final -Exam 1 Review

Question 1

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

7. 99 × 1030 photons
8. 99 × 1023 photons
9. 67 × 1023 photons
10. 25 × 1031 photons
11. 01 × 1024 photons

Answer 1

4.99

Question 2

Which of the following types of waves are considered electromagnetic radiation:
A) Radio Waves; B) Sound Waves; C) Microwaves; D) Ocean Waves; E) Mechanical Waves

A and B 
A and C 
B and D 
A, C, and E 
B, C, and D

Answer 2

A and C

Question 3

Determine the mass of a ball with a velocity of 42.5 m/s and a wavelength of 8.92 × 10-34 m.

594 g

2. 51 g
3. 5 g
4. 2 g
5. 6 g

Answer 3

17.5

Question 4

What is the wavelength of an electron (m = 9.11 × 10-28 g) moving at 1/5 the speed of light?

1. 21 × 10^-11 m
2. 73 × 10^-8 m
3. 85 × 10^-10 m
4. 36 × 10^-9 m
5. 42 × 10^-12 m

Answer 4

1.21

Question 5

According to the Heisenberg Uncertainty Principle:

A) an electron has a charge of 1.602 × 10^-19 C

B) electrons must always absorb energy when moving to higher quantum levels

C)you cannot accurately know both the position and momentum of an electron at the same time

D)an electron can never appear in the exact same position twice

E) s orbitals are spherical in nature

Answer 5

C

Question 6

The de Broglie wavelength of an electron with a velocity of 7.40 × 10^6 m/s is ________ m. The mass of the electron is 9.11 × 10^-28 g.

A) 9.83 × 10^-14 
B) 1.02 × 10^13 
C) 9.83 × 10^-11 
D) 1.02 × 10^10 
E) 9.83 × 10^-17

Answer 6

C

Question 7

What are the possible orbitals for n = 3?

A) s, p, d
B) s, p
C) s, p, d, f
D) s

Answer 7

A

Question 8

Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n=4 and the atom emits a photon of light with a wavelength of 486 nm.

2 
1 
3 
5 
4

Answer 8

2

Question 9

Which of the following elements is NOT a metal?

Ba 
Pb 
Xe 
Ga 
Mg

Answer 9

Xe

Question 10

What is the ground state of N

Answer 10

1s^2, 2s^2, 2p^3

to see look at quiz one question14

Question 11

The element that corresponds to the electron configuration 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^1, 3d^5 is ________.

titanium 
iron 
manganese 
chromium 
vanadium

Answer 11

chromium

Question 12

Give the ground state electron configuration for Se.

A) [Ar]4s^2, 3d^10 
B) [Ar]4s^2, 4d^10, 4p^4 
C) [Ar]4s^2, 3d^10, 4p^6 
D) [Ar]3d^10, 4p^4 
E) [Ar]4s^2, 3d^10, 4p^4

Answer 12

E

Question 13

Identify the element that has a ground state electronic configuration of [Kr]5s^2, 4d^5.

Mn
Nb
Ru
Tc

Answer 13

Tc

Question 14

How many valence electrons do the halogens possess?

2 
6 
5 
7 
1

Answer 14

7

Question 15

How many valence electrons do the noble gases possess?

2 
1 
7 
8 
6

Answer 15

8

Question 16

Which describes the valance electrons of magnesium?

A) 3s^0 
B) 3s^2, d^1 
C) 3s^1 
D) 3s^2, d^2 
E) 3s^2

Answer 16

E

Question 17

Which of the following statements is FALSE?

A) Halogens are very reactive elements.
B) Zn is a transition metal.
C) Noble gases do not usually form ions.
D) The alkali metals are fairly unreactive.
E) Sulfur is a main group element.

Answer 17

D

Question 18

Which element would most likely form an ion with a charge of -2?

Al 
N 
I 
Te 
Na

Answer 18

Te

Question 19

Which of the following elements is a noble gas?

As 
O 
I 
Fe 
Kr

Answer 19

Kr

Question 20

Which of the following elements is a halogen?

Sb 
C 
I 
Sn 
He

Answer 20

I

Question 21

Which of the following elements is a nonmetal?

Pu 
C 
Br 
Li 
Mg

Answer 21

C

Question 22

The distance between adjacent crests is called

frequency 
median 
wavelength 
amplitude 
area

Answer 22

wavelength

Question 23

A sunburn is caused by overexposure to ________ radiation.

microwave 
ultraviolet 
x-ray 
gamma 
radio

Answer 23

ultraviolet

Question 24

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

A) 7.99 × 10^30 photons 
B) 4.99 × 10^23 photons 
C) 5.67 × 10^23 photons 
D) 1.25 × 10^31 photons 
E) 2.01 × 10^24 photons

Answer 24

B

Question 25

Determine the shortest frequency of light required to remove an electron from a sample of Ti metal, if the binding energy of titanium is 3.14 × 10^3 kJ/mol.

A) 4.74 x 10^15 Hz 
B) 2.11 x 10^15 Hz 
C) 6.19 x 10^15 Hz 
D) 7.87 x 10^15 Hz 
E) 1.27 x 10^15 Hz

Answer 25

D

Question 26

molecules can be described as

a. mixtures of two or more pure substances
b. mixtures of two or more elements that has a specific ratio between components
c. two or more atoms chemically joined together
d. heterogeneous mixtures
e. homogenous mixtures

Answer 26

C