Section 5.2
Quantum Theory and the Atom
Practice Test
1.
What is the lowest energy state of an atom called?
a.
the chaotic state
b.
the solid state
c.
the ground state
d.
the excited state
Hint
2.
Which of the following statements is true?
a.
Each set of d orbitals contains seven orbitals.
b.
Each set of d orbitals can hold a maximum of 14 electrons.
c.
All s orbitals are spherically shaped.
d.
The first energy level contains only s and p orbitals.
Hint
3.
The concept that all moving particles have wave characteristics is attributed to ___________.
SC.A.2.4.6
a.
Thomson
b.
Bohr
c.
de Broglie
d.
Heisenberg
Hint
4.
How many types of orbitals are present in atoms of elements in the third period of the periodic table?
SC.A.2.4.5
a.
2
b.
4
c.
1
d.
3
Hint
5.
In the periodic table, the principal quantum number corresponds to the ________.
SC.A.2.4.5
a.
lanthanides
b.
group number
c.
transition metals
d.
period number
Hint
6.
The ground state of hydrogen corresponds to the _________.
a.
zeroeth energy level
b.
highest energy level
c.
first energy level
d.
second energy level
Hint
7.
The Heisenberg uncertainty principle states that ____________.
a.
it is impossible to simultaneously know the precise position and velocity of a particle
b.
electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set
c.
two atoms of the same element must have the same number of protons
d.
no two electrons in the same atom can have the same set of four quantum numbers
Hint
8.
What is the maximum number of electrons that can be present in each principal energy level of hydrogen?
Hydrogen’s First Four Principal Energy Levels
Principal quantum number n
Sublevels types of orbitals present
Number oforbitals related to sublevel
Total number
of orbitals related to principal energy level
n
2
1
s
1
1
2
s
p
1
3
4
3
s
p
d
135
9
4
s
p
d
f
1
3
5
7
16
SC.C.1.4.1
a.
n
b.
n
2
c.
2n
2
d.
2n
Hint
