Atomic Theory IV | Chemistry | Quiz

The Heisenberg Uncertainty Principle considers which properties of the electron?

Its position and momentum

Only its position

Only its momentum

The reduced Planck constant
The position of an electron in an atom at any given time can be precisely known.

true

false
Given the following table of data, which of the following is a permissible set of the quantum numbers n, l, m, and s? (Note: though not shown in the table, s can equal -½ or +½.)

n = 0, l = 0, m = 0, s = +½

n = 1, l = 1, m = 0, s = +½

n = 1, l = 0, m = 1, s = +½

n = 1, l = 0, m = 0, s = +½
How many d orbitals are there in a d-subshell of any given atom?

1

3

5

7
When considering the Aufbau process of filling electron orbitals, which of the following sets of quantum numbers for n, l, m, and s are feasible in order for the final electron to enter a nitrogen atom? (A nitrogen atom has 7 electrons.)

n = 1, l = 0, m = 0, and s = +½

n = 1, l = 1, m = 0, and s = +½

n = 2, l = 0, m = 0, and s = +½

n = 2, l = 1, m = 1, and s = +½
Which of the following represents a set of degenerate orbitals?

1s, 2s, and 3s

2p_x, 2p_y, and 2p_z

3s and 3p

3s, 3p, and 3d
Keeping in mind Hund’s rule, how many occupied orbitals, and how many unpaired electrons, are expected in an atom of oxygen (atomic number 8) in the ground state?

Occupied orbitals = 4; unpaired electrons = 0

Occupied orbitals = 3; unpaired electrons = 2

Occupied orbitals = 5; unpaired electrons = 2

Occupied orbitals = 5; unpaired electrons = 0
When the absorption spectrum of hydrogen atoms in their ground state is examined, the only lines that are observed are in the Lyman series (not the Balmer, Paschen or Pfund series). Which of the following is the best explanation for this observation?

There is only one electron in a hydrogen atom.

An electron in a hydrogen atom can only fall back to n = 1.

When hydrogen atoms absorb energy, the electrons fall to the n = 1 level.

In the ground state, hydrogen’s single electron always has n = 1.
Which of the following hydrogen atom electronic transitions would release the greatest amount of energy?

From n = 1 to n = 2

From n = 2 to n = 3

From n = 3 to n = 2

From n = 6 to n = 5
Which of the following electronic configurations represents an excited state of neon (atomic number 10)?

1s² 2s² 2p⁵ 3s¹

1s² 2s² 2p⁵

1s² 2s² 2p⁶

1s² 2s² 2p⁶ 3s¹