$E = -2.18 \times 10^{-18} \ \mathrm{J} \left( \frac{1}{3^2} \right)$

$\Delta E = -2.18 \times 10^{-18} \ \mathrm{J} \left( \frac{1}{2^2} - \frac{1}{5^2} \right)$

Question 1

According to the Bohr model, what is the energy of an electron in the $n=3$ level of a hydrogen atom?

Accepted Answer

$E = -2.18 	imes 10^{-18} \ \mathrm{J} \left( \frac{1}{3^2} ight)$

Question 2

What is the change in energy, $\Delta E$, when an electron in a hydrogen atom transitions from $n=5$ to $n=2$?

Accepted Answer

$\Delta E = -2.18 	imes 10^{-18} \ \mathrm{J} \left( \frac{1}{2^2} - \frac{1}{5^2} ight)$

Question 3

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

The azimuthal quantum number $l$

Question 4

How many possible values of $m_l$ are there for $l=2$?

Accepted Answer

5

Question 5

Which set of quantum numbers is not allowed for an electron in an atom?

Accepted Answer

$n=2, \ l=2, \ m_l=0, \ m_s=+\frac{1}{2}$

Question 6

How many electrons can occupy a 3p subshell?

Accepted Answer

6

Question 7

Which of the following best describes the Pauli Exclusion Principle?

Accepted Answer

No two electrons in the same atom can have the same set of four quantum numbers.

Question 8

What is the maximum number of electrons that can occupy the $n=4$ shell?

Accepted Answer

32

Question 9

Which quantum number(s) determine the orientation of an orbital in space?

Accepted Answer

The magnetic quantum number $m_l$

Question 10

How many orbitals are there in a subshell with $l=3$?

Accepted Answer

7

Question 11

Which of the following transitions in a hydrogen atom would emit the highest energy photon?

Accepted Answer

From $n=2$ to $n=1$

Question 12

What is the total number of orbitals in the $n=2$ shell?

Accepted Answer

4

Question 13

Which quantum number is responsible for the energy level of an electron in a hydrogen atom?

Accepted Answer

The principal quantum number $n$

Question 14

How many possible values of $m_l$ are there for a $d$ orbital?

Accepted Answer

5

Question 15

Which of the following is a valid set of quantum numbers for an electron in a 4f orbital?

Accepted Answer

$n=4, \ l=3, \ m_l=2, \ m_s=+\frac{1}{2}$

Question 16

If an electron has quantum numbers $n=3$, $l=2$, $m_l=0$, what type of orbital is it in?

Accepted Answer

3d orbital

Question 17

How many electrons can occupy all the orbitals with $n=2$ in an atom?

Accepted Answer

8

Question 18

Which of the following statements about the quantum numbers is correct?

Accepted Answer

$l$ can have integer values from $0$ to $n-1$

Question 19

What is the maximum number of electrons that can occupy a single orbital?

Accepted Answer

2

Question 20

Which quantum number distinguishes between the different orientations of orbitals within a subshell?

Accepted Answer

Magnetic quantum number $m_l$

Bohr Model, Quantum-Mechanical Model, and Atomic Orbitals: Study Notes

Study Guide - Practice Questions