Question 1

Which of the following statements best describes the relationship between the shell number ($n$) and the energy of an electron in an atom?

Accepted Answer

As $n$ increases, the electron's energy increases.

Question 2

Given the periodic table image, which shell number ($n$) corresponds to the highlighted element in the third row?

Accepted Answer

$n = 3$

Question 3

Which of the following is a possible value for the shell number ($n$) of an atom?

Accepted Answer

$n = 2$

Question 4

Why must the shell number ($n$) be an integer?

Accepted Answer

Because electrons can only exist at discrete energy levels.

Question 5

Which electron possesses the lowest possible energy according to the shell diagram provided?

Accepted Answer

Electron in shell $C$

Question 6

If an atom has electrons in the $n = 4$ shell, what does this indicate about its position in the periodic table?

Accepted Answer

It is in the fourth row of the periodic table.

Question 7

Which of the following best explains why electrons in higher shells have higher potential energy?

Accepted Answer

They are farther from the nucleus and experience less attraction.

Question 8

A student claims that an atom can have a shell number $n = 0$. Is this correct? Why or why not?

Accepted Answer

No, because $n$ must be a positive integer.

Question 9

Which of the following elements would have electrons in the $n = 2$ shell?

Accepted Answer

Elements in the second row of the periodic table.

Question 10

If an electron transitions from $n = 3$ to $n = 1$, what happens to its energy?

Accepted Answer

The electron loses energy.

Question 11

Which of the following best describes the limitation on the shell number $n$?

Accepted Answer

$n$ must be a positive integer.

Question 12

In a real-world scenario, why is it important to understand the shell structure of atoms when designing semiconductors?

Accepted Answer

Because the shell structure determines the electrical properties of materials.

Question 13

Which of the following is NOT a correct statement about the energy levels (shells) in an atom?

Accepted Answer

The shell number $n$ can be fractional.

Question 14

If an atom is in the $n = 5$ shell, which row of the periodic table does it belong to?

Accepted Answer

Fifth row

Question 15

Which of the following best describes the potential energy of electrons in different shells?

Accepted Answer

Electrons in shells with higher $n$ have higher potential energy.

Electronic Structure: Shells and Quantum Numbers

Study Guide - Practice Questions