1. What is a subshell in an atom?
A.
A subdivision of a shell
B.
The nucleus of an atom
C.
A group of atoms
D.
A positively charged particle
Correct Answer:
A subdivision of a shell
Explanation:
A subshell is a subdivision of a principal shell in an atom, identified by the azimuthal quantum number.
2. Subshells are distinguished from one another by which quantum number?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Correct Answer:
Azimuthal quantum number
Explanation:
The azimuthal quantum number identifies the subshell within a principal shell.
3. Which set correctly represents the names of common subshells?
A.
s, p, d, f
B.
K, L, M, N
C.
1, 2, 3, 4
D.
α, β, γ, δ
Correct Answer:
s, p, d, f
Explanation:
Subshells are commonly represented by the letters s, p, d, and f.
4. The principal shell with n = 2 contains which subshells?
A.
2s and 2p
B.
1s and 1p
C.
2p and 2d
D.
3s and 3p
Correct Answer:
2s and 2p
Explanation:
For n = 2, the allowed subshells are s and p, so the subshells are 2s and 2p.
5. How many subshells are present in the principal shell n = 3?
A.
One
B.
Two
C.
Three
D.
Four
Correct Answer:
Three
Explanation:
The number of subshells in a shell equals its principal quantum number. Thus, the n = 3 shell has three subshells: 3s, 3p, and 3d.
6. Which subshell is represented by the azimuthal quantum number l = 0?
A.
s subshell
B.
p subshell
C.
d subshell
D.
f subshell
Correct Answer:
s subshell
Explanation:
The s subshell is defined by l = 0.
7. Which subshell is represented by the azimuthal quantum number l = 1?
A.
s subshell
B.
p subshell
C.
d subshell
D.
f subshell
Correct Answer:
p subshell
Explanation:
The p subshell is defined by the azimuthal quantum number l = 1.
8. Which of the following is a valid subshell notation?
A.
2p
B.
p2s
C.
2q
D.
s3p
Correct Answer:
2p
Explanation:
A subshell is written using the principal shell number followed by its letter designation, such as 2p.
9. What does the notation 3d represent?
A.
The d subshell of the third principal shell
B.
The third orbital of the d shell only
C.
The d shell of the third atom
D.
The third electron in a d subshell
Correct Answer:
The d subshell of the third principal shell
Explanation:
In 3d, the number 3 identifies the principal shell and the letter d identifies the subshell.
10. Which statement correctly describes the relationship between a shell and a subshell?
A.
A shell can contain one or more subshells
B.
A subshell always contains several shells
C.
A shell and a subshell are completely unrelated
D.
A subshell is larger than every shell
Correct Answer:
A shell can contain one or more subshells
Explanation:
A principal shell is divided into subshells, with the number and types of subshells determined by the principal quantum number.
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