Quantum Numbers Flashcards
What are quantum numbers?
Quantum numbers are values that describe the energy levels and positions of electrons in an atom.
How many types of quantum numbers are there?
There are four types of quantum numbers: principal, azimuthal, magnetic, and spin.
What does the principal quantum number (n) represent?
The principal quantum number (n) represents the energy level or shell of an electron.
What values can the principal quantum number (n) take?
The principal quantum number (n) can take positive integer values: n = 1, 2, 3, …
What does the azimuthal quantum number (l) indicate?
The azimuthal quantum number (l) indicates the subshell or shape of the electron cloud.
What are the possible values for the azimuthal quantum number (l)?
The possible values for l range from 0 to n-1.
What does the magnetic quantum number (m_l) specify?
The magnetic quantum number (m_l) specifies the orientation of the orbital in space.
What are the possible values for the magnetic quantum number (m_l)?
The possible values for m_l range from -l to +l.
What does the spin quantum number (m_s) represent?
The spin quantum number (m_s) represents the intrinsic spin of an electron.
What are the possible values for the spin quantum number (m_s)?
The possible values for m_s are +1/2 and -1/2.
True or False: The principal quantum number determines the size of the electron cloud.
True.
True or False: The azimuthal quantum number can be negative.
False.
Fill in the blank: The quantum number associated with the shape of the orbital is called the __________ quantum number.
azimuthal
What is the maximum number of electrons that can occupy a single orbital?
Two electrons.
Which quantum number describes the energy sublevel of an electron?
The azimuthal quantum number (l).
What is the significance of the Pauli Exclusion Principle in relation to quantum numbers?
The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers.
Multiple Choice: Which quantum number would you use to determine the orientation of a p orbital?
A) n
B) l
C) m_l
D) m_s
C) m_l
What is the relationship between the principal quantum number (n) and the number of subshells?
The number of subshells in a principal energy level is equal to n.
True or False: The spin quantum number can have any integer value.
False.
What is the maximum number of electrons in a principal energy level (n)?
The maximum number of electrons is given by the formula 2n^2.
What does a higher principal quantum number (n) indicate about an electron?
A higher principal quantum number (n) indicates that the electron is further from the nucleus and has higher energy.
Fill in the blank: The quantum number that determines the number of orbitals in a subshell is the __________ quantum number.
magnetic
What is the value of l for a d subshell?
The value of l for a d subshell is 2.
Multiple Choice: Which of the following is NOT a quantum number?
A) Principal quantum number
B) Azimuthal quantum number
C) Orbital quantum number
D) Spin quantum number
C) Orbital quantum number
What is the relationship between quantum numbers and the electron configuration of an atom?
Quantum numbers define the energy levels, shapes, orientations, and spins of electrons, which are used to determine the electron configuration.
