Completing the Model of the Atom
Practice Test
1.
a.
violet
b.
green
c.
blue
d.
red
2.
1s
2
2s
2
2p
1
is the electron configuration for _________.
a.
lithium
b.
boron
c.
hydrogen
d.
fluorine
3.
The two rows beneath the main body of the periodic table contain the _________________.
a.
halogens
b.
noble gases
c.
alkali metals
d.
inner transition elements
4.
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
5.
The elements in Groups 1, 2, and 13-17 are called the _____________.
a.
alkali metals
b.
main group elements
c.
noble gases
d.
transition elements
6.
How many electrons may be contained in a p sublevel?
a.
six
b.
three
c.
eight
d.
ten
7.
The space in which there is a 95% probability of finding an electron is called __________.
a.
an energy level
b.
an energy sublevel
c.
an electron sphere
d.
an orbital
8.
Which of these is the electron configuration of an atom most likely to lose an electron?
a.
1s2 2s2 2p6
b.
1s2 2s2 2p6 3s2 3p5
c.
[He]2s2 2p5
d.
1s2 2s2 2p6 3s2 3p6 4s1
9.
Energy sublevels are designated _____________.
a.
1, 2, 3, and 4
b.
s, p, d, and f
c.
x, y, and z
d.
a, b, c, and d
10.
Which of these is the electron configuration of an atom most likely to gain an electron?
a.
1s2 2s2 2p6
b.
1s2 2s2 2p6 3s2 3p6 4s1
c.
1s2 2s2 2p6 3s1
d.
1s2 2s2 2p6 3s2 3p5
11.
When an iron atom loses all its 4s electrons and one 3d electron, its oxidation number is ______.
a.
11+
b.
3+
c.
1+
d.
5+
12.
The Heisenberg uncertainty principle states that it is fundamentally impossible to know both the ____________________ of the electron at the same time.
a.
mass and size
b.
position and energy
c.
energy and orientation
d.
mass and position
13.
The third energy level may have ____________ sublevels.
a.
eight
b.
two
c.
four
d.
three
14.
The fourth energy level can hold _______ more electrons than the third energy level.
a.
14
b.
10
c.
6
d.
2
15.
If an s sublevel could contain up to three electrons, which element would be the first noble gas?
a.
helium
b.
lithium
c.
neon
d.
carbon
16.
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
17.
What element has the electron configuration [Ar]4s
2
3d
3
?
a.
nitrogen
b.
arsenic
c.
vanadium
d.
scandium
18.
The most stable arrangement of electrons in an atom's sublevels and orbitals is called its ________________.
a.
electronic arrangement
b.
electron orientation
c.
shape
d.
electron configuration
19.
What electron configuration describes the outermost energy level of a selenium atom?
a.
4s
2
4d
4
b.
4s
2
3d
10
c.
4s
2
4d
10
4p
4
d.
4s
2
4p
4
