Review Questions electrons in atoms
Multiple-choice exercise
Use these values to assist you in answering some of the questions in this problems set:
h = 6.626 x 10-34J·sec
c = 2.9979 x 108 m/sec
Show questions one by one
1. Researchers at Lawrence Berkeley National Lab have recently formed a new
synthetic element with atomic number 118 and mass number 293. Which of the
following elements would have chemical properties most similar to this new
element?
A.
?
Xe
B.
?
Ir
C.
?
S
D.
?
Pb
E.
?
Ta
2. Which of the following relationships is incorrect with regard to electromagnetic
radiation?
A.
?
none of these
B.
?
longer wavelength = higher energy
C.
?
longer wavelength = lower frequency
D.
?
higher frequency = higher energy
E.
?
all of these
3. Which of these elements would have the highest second ionization energy?
A.
?
hydrogen
B.
?
potassium
C.
?
calcium
D.
?
fluorine
E.
?
sulfur
4. An element Z has the configuration [Xe]6s2. The oxide of this element will have
the formula:
A.
?
Z2O
B.
?
None of these
C.
?
ZO
D.
?
ZO2
E.
?
Z2O3
5. Excluded
Which of the following combinations of quantum numbers is not allowed?
A.
?
n = 3, l = 1, m(l) = 1, m(s) = ½
B.
?
n = 1, l = 0, m(l) = 1, m(s) = ½
C.
?
n = 4, l = 2, m(l) = 0, m(s) = ½
D.
?
n = 5, l = 3, m(l) = -2, m(s) = -½
E.
?
n = 2, l = 1, m(l) = -1, m(s) = -½
6. An element having the configuration [Xe]6s1 belongs to the Group:
A.
?
halogens
B.
?
alkaline earth metals
C.
?
noble gases
D.
?
None of these
E.
?
alkali metals
7. Excluded
For which of the following transitions does the light emitted have the shortest
wavelength?
A.
?
n = 4 to n = 2
B.
?
n = 2 to n = 1
C.
?
n = 3 to n = 2
D.
?
n = 4 to n = 3
E.
?
n = 5 to n = 3
8. Which of the following statements are true?
A.
B.
C.
D.
E.
? The first ionization energy of fluorine is greater than the first
ionization energy of oxygen.
?
All are false
? As the atomic number increases within a group of the representative
elements, the tendency is for first ionization energy to increase.
?
It is easier to remove an electron from Na+ than from Na.
? All particles with the electron configuration [Ar]4s2 have the same
ionization energy.
9. How many unpaired electrons are there in an atom of tin in its ground state?
A.
?
0
B.
?
2
C.
?
1
D.
?
4
E.
?
3
10. Excluded
How many electrons in an atom can have n = 5, l = 3?
A.
?
None of these
B.
?
14
C.
?
2
D.
?
10
E.
?
6
11. Which of the following forms of electromagnetic radiation has the shortest
wavelength?
A.
?
infrared
B.
?
ultraviolet
C.
?
radio waves
D.
?
visible light
E.
?
microwaves
12. Which of the following atoms would experience the greatest energy loss when
gaining an electron?
A.
?
N
B.
?
Mg
C.
?
Na
D.
?
Cl
E.
?
Li
13. Which of the following particles has the greatest atomic radius?
A.
?
S
B.
?
Al3+
C.
?
Si
D.
?
Al
E.
?
P
14. How many electrons can fit in all of the orbitals in which n = 3?
A.
?
18
B.
?
14
C.
?
32
D.
?
6
E.
?
2
15. Which of these elements has three electrons in degenerate orbitals?
A.
?
Pd
B.
?
Po
C.
?
Hg
D.
?
Si
E.
?
P
16. How many f orbitals have n = 3?
A.
?
3
B.
?
0
C.
?
5
D.
?
7
E.
?
1
17. What is the wavelength of a photon whose frequency is 3.90 x 10 14 Hz?
A.
?
4.51 nm
B.
?
769 nm
C.
?
1.27 x 10-3
D.
?
7.69 x 10-7 nm
E.
?
1.30 x 105 nm
18. Of the following elements, which one is most likely to form an ion through the
loss of two electrons?
A.
?
strontium
B.
?
aluminum
C.
?
sulfur
D.
?
chlorine
E.
?
sodium
19. A photon has a frequency is 3.90 x 1014 Hz. What is the energy of the photon?
A.
?
1.13 x 1019 J
B.
?
9.08 x 10-3 J
C.
?
4.75 x 10-16 J
D.
?
2.60 x 10-19 J
E.
?
4.75 x 1016 J
20. Each electron in an atom has a unique set of four quantum numbers. This
observation is credited to:
A.
?
Hund
B.
?
Bohr
C.
?
Heisenberg
D.
?
Pauli
E.
?
Mendeleev