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 energy of the electron increases.

Question 2

Given the periodic table, which shell number ($$n) $$corresponds to the outermost electrons of selenium (Se)?

Accepted Answer

$$n = 4$$

Question 3

Which of the following is NOT a possible value for the shell number $$n of an $$atom?

Accepted Answer

$$n = 0$$

Question 4

If an electron is in the $$n = 1$$ shell, what can you infer about its energy compared to electrons in higher shells?

Accepted Answer

It has the lowest energy.

Question 5

Which of the following elements has its outermost electrons in the $$n = 3$$ shell?

Accepted Answer

Aluminum (Al)

Question 6

A student claims that the shell number $$n$$ can be any integer, including negative numbers. Which statement best corrects this misconception?

Accepted Answer

The shell number $$n$$ must be a positive integer ($$n = 1, 2, 3, \ldots).$$

Question 7

Which electron in the provided Bohr model image possesses the lowest possible energy?

Accepted Answer

The electron in the $$n = 1$$ shell.

Question 8

If an atom has electrons in the $$n = 1$$, $$n = 2$$, and $$n = 3$$ shells, which shell contains electrons with the highest potential energy?

Accepted Answer

$$n = 3$$

Question 9

Which of the following best explains why the periodic table is organized into rows based on shell numbers?

Accepted Answer

Each row corresponds to a different shell number $$n$$ for the valence electrons.

Question 10

A patient is exposed to a chemical that excites electrons from $$n = 1 to$$ $$n = 3. $$What happens to the energy of these electrons?

Accepted Answer

The electrons gain energy.

Question 11

Which of the following is a correct statement about the limitation on the shell number $$n$$?

Accepted Answer

$$n$$ must be an integer greater than or equal to 1.

Question 12

If an atom's outermost electrons are in the $$n = 2$$ shell, which period of the periodic table does it belong to?

Accepted Answer

Period 2

Question 13

Which of the following best describes the trend in atomic size as the shell number $$n$$ increases?

Accepted Answer

Atomic size increases as $$n$$ increases.

Question 14

A scientist observes that an electron transitions from $$n = 4 to$$ $$n = 2. $$What is the most likely result of this transition?

Accepted Answer

The electron emits energy.

Question 15

Which of the following is a possible value for the shell number $$n$$ for an atom in the third period of the periodic table?

Accepted Answer

$$n = 3$$

Question 16

If an atom has electrons in the $$n = 1$$ and $$n = 2$$ shells, which shell's electrons are closer to the nucleus?

Accepted Answer

$$n = 1$$

Atomic Shells and Quantum Numbers: Study Notes for GOB Chemistry

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