Completing the Model of the Atom
Practice Test
1.
The light emitted by the gas in a neon sign is _________________.
a.
an electron
b.
a filament
c.
an emission spectrum
d.
an incandescent light
2.
a.
blue
b.
red
c.
violet
d.
green
3.
The two rows beneath the main body of the periodic table contain the _________________.
a.
inner transition elements
b.
noble gases
c.
alkali metals
d.
halogens
4.
These orbitals are aligned along the x, y, and z axes.
a.
p orbitals
b.
d orbitals
c.
s orbitals
d.
f orbitals
5.
The elements in Groups 1, 2, and 13-17 are called the _____________.
a.
main group elements
b.
transition elements
c.
noble gases
d.
alkali metals
6.
When an iron atom loses all its 4s electrons and one 3d electron, its oxidation number is ______.
a.
5+
b.
11+
c.
3+
d.
1+
7.
Except for helium, noble gas atoms have _________.
a.
duets
b.
octets
c.
trios
d.
quartets
8.
An electron in an atom emits energy in the form of light when it ________________.
a.
rises to a new energy level
b.
falls back to a lower energy level
c.
leaves the nucleus
d.
leaves the atom
9.
1s
2
2s
2
2p
1
is the electron configuration for _________.
a.
boron
b.
fluorine
c.
hydrogen
d.
lithium
10.
What electron configuration describes the outermost energy level of a molybdenum atom?
a.
6p
6
b.
5d
4
c.
5s
2
d.
4d
4
11.
The most stable arrangement of electrons in an atom's sublevels and orbitals is called its ________________.
a.
shape
b.
electronic arrangement
c.
electron orientation
d.
electron configuration
12.
If an s sublevel could contain up to three electrons, which element would be the first noble gas?
a.
neon
b.
lithium
c.
helium
d.
carbon
13.
What element has the electron configuration [Ar]4s
2
3d
3
?
a.
scandium
b.
nitrogen
c.
vanadium
d.
arsenic
14.
The space in which there is a 95% probability of finding an electron is called __________.
a.
an orbital
b.
an energy level
c.
an energy sublevel
d.
an electron sphere
15.
The number of valence electrons in a sulfur atom is __________.
a.
four
b.
two
c.
six
d.
eight
16.
Which of these is the electron configuration of an atom most likely to lose an electron?
a.
1s2 2s2 2p6 3s2 3p5
b.
[He]2s2 2p5
c.
1s2 2s2 2p6 3s2 3p6 4s1
d.
1s2 2s2 2p6
17.
How many electrons may be contained in a p sublevel?
a.
three
b.
eight
c.
six
d.
ten
18.
Energy sublevels are designated _____________.
a.
x, y, and z
b.
1, 2, 3, and 4
c.
s, p, d, and f
d.
a, b, c, and d
19.
What electron configuration describes the outermost energy level of a selenium atom?
a.
4s
2
3d
10
b.
4s
2
4p
4
c.
4s
2
4d
10
4p
4
d.
4s
2
4d
4
