Chapter 7:
Completing the Model of the Atom
Practice Test
1.
How many electrons may be contained in a p sublevel?
a.
three
b.
eight
c.
ten
d.
six
Hint
2.
If an s sublevel could contain up to three electrons, which element would be the first noble gas?
a.
carbon
b.
lithium
c.
neon
d.
helium
Hint
3.
The Heisenberg uncertainty principle states that it is fundamentally impossible to know both the ____________________ of the electron at the same time.
a.
position and energy
b.
mass and size
c.
mass and position
d.
energy and orientation
Hint
4.
The number of valence electrons in a sulfur atom is __________.
a.
two
b.
six
c.
four
d.
eight
Hint
5.
The fourth energy level can hold _______ more electrons than the third energy level.
a.
2
b.
6
c.
10
d.
14
Hint
6.
When an iron atom loses all its 4s electrons and one 3d electron, its oxidation number is ______.
a.
11+
b.
5+
c.
1+
d.
3+
Hint
7.
Atoms of which element have the largest s orbitals?
a.
Fr
b.
Na
c.
H
d.
Rb
Hint
8.
What is the electron configuration of radon?
a.
[Xe]5s
2
5p
6
b.
[Xe]5d
8
c.
[Rn]6s
2
6p
6
d.
[Xe]6s
2
6p
6
Hint
9.
1s
2
2s
2
2p
1
is the electron configuration for _________.
a.
fluorine
b.
boron
c.
hydrogen
d.
lithium
Hint
10.
The light emitted by the gas in a neon sign is __________.
a.
a filament
b.
an emission spectrum
c.
an electron
d.
an incandescent light
Hint
11.
The space in which there is a 95% probability of finding an electron is called __________.
a.
an orbital
b.
an electron sphere
c.
an energy sublevel
d.
an energy level
Hint
12.
These orbitals are aligned along the x, y, and z axes.
a.
s orbitals
b.
p orbitals
c.
d orbitals
d.
f orbitals
Hint
13.
What element has the electron configuration [Ar]4s
2
3d
3
?
a.
vanadium
b.
nitrogen
c.
scandium
d.
arsenic
Hint
14.
Which spectral line, red, green, violet, or blue, has the greatest energy?
a.
red
b.
green
c.
blue
d.
violet
Hint
15.
What electron configuration describes the outermost energy level of a selenium atom?
a.
4s
2
4p
4
b.
4s
2
4d
4
c.
4s
2
4d
10
4p
4
d.
4s
2
3d
10
Hint
16.
A nitrogen atoms that gains electrons to make an octet has an oxidation number of ______.
a.
1-
b.
4-
c.
3-
d.
3+
Hint
17.
The most stable arrangement of electrons in an atom's sublevels and orbitals is called its ________________.
a.
electron configuration
b.
electron orientation
c.
shape
d.
electronic arrangement
Hint
18.
The two rows beneath the main body of the periodic table contain the _________________.
a.
halogens
b.
alkali metals
c.
inner transition elements
d.
noble gases
Hint
19.
What electron configuration describes the outermost energy level of a molybdenum atom?
a.
6p
6
b.
4d
4
c.
5s
2
d.
5d
4
Hint
20.
An electron in an atom emits energy in the form of light when it ________________.
a.
leaves the atom
b.
falls back to a lower energy level
c.
rises to a new energy level
d.
leaves the nucleus
Hint
