Electrons in Atoms
Practice Test
1.
What is the frequency of yellow light , which has a wavelength of 5.56 x 10
-7
m?
a.
5.40 x 10
14
m/s
b.
1.85 x 10
15
Hz
c.
5.40 x 10
14
Hz
d.
1.85 x 10
15
m/s
2.
A wavelength of 500 nm is associated with the _______ portion of the electromagnetic spectrum.
a.
infrared
b.
microwave
c.
ultraviolet
d.
visible
3.
In the periodic table, the principal quantum number corresponds to the ________.
a.
group number
b.
transition metals
c.
lanthanides
d.
period number
4.
The concept that all moving particles have wave characteristics is attributed to ___________.
a.
Bohr
b.
Heisenberg
c.
Thomson
d.
de Broglie
5.
When an atom loses energy by electron transition, a(n) _____________ is produced.
a.
ion
b.
adsorption
c.
absorption
d.
emission
6.
The ground state of hydrogen corresponds to the _________.
a.
first energy level
b.
zeroeth energy level
c.
second energy level
d.
highest energy level
7.
What is the symbol of the element that has the following electron configuration? 1s
2
2s
2
2px
2
2py
2
2pz
2
3s
2
3px
2
3py
2
3pz
1
a.
Cl
b.
S
c.
Si
d.
P
8.
An element whose atoms have four valence electrons is _______.
a.
Cr
b.
Sn
c.
Ti
d.
Nb
9.
An element with the outermost electron configuration, ns
2
np
4
, could be _______.
a.
Se
b.
Mo
c.
Pb
d.
Zr
10.
What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg?
a.
3.4 x 10
-34
m
b.
34 m
c.
3.4 x 10
-38
m
d.
1.3 x 10
-38
m
11.
Which of the following statements is true?
a.
Each set of d orbitals contains seven orbitals.
b.
The first energy level contains only s and p orbitals.
c.
All s orbitals are spherically shaped.
d.
Each set of d orbitals can hold a maximum of 14 electrons.
12.
The Heisenberg uncertainty principle states that ____________.
a.
it is impossible to simultaneously know the precise position and velocity of a particle
b.
no two electrons in the same atom can have the same set of four quantum numbers
c.
two atoms of the same element must have the same number of protons
d.
electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set
13.
Which of the following affects the amplitude of a wave?
a.
speed of light
b.
frequency
c.
wavelength
d.
amount of energy carried by the wave
14.
The valence orbitals in an atom are the ___________.
a.
innermost orbitals
b.
d orbitals
c.
outermost orbitals
d.
second energy level
15.
The part of the electromagnetic spectrum that humans can see is the ________.
a.
visible spectrum
b.
ultraviolet spectrum
c.
a, b, and c
d.
infrared spectrum
