Question

Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n, l, ml, ms).

Part B:

Identify which sets of quantum numbers are valid for an electron. Each set is ordered(n,l,ml,ms). Identify the sets of quantum numbers that describe all the electrons in the ground state of a neutral beryllium atom, Be. Each set is ordered(n,l,ml,ms). Drag the appropriate items to their respective bins.

Thanks in advance! Any helpful explanation on how to do this problem would also be appreciated.

Answer 1

Concepts and reason

Four quantum numbers: (n, l,ml,ms)

Four quantum numbers are used to describe the most probable position of the electron of an atom in space.

The Pauli Exclusion Principle:

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

Hund’s Rule:

Electrons fill each orbital first in a subshell with one electron before entering half-filled orbitals.

Aufbau Principle:

Electrons will occupy the lowest energy level orbital first. This is used to determine the electronic configuration of an atom or ion.

Fundamentals

Four quantum numbers and their symbols:

Quantum Number	Symbol	Possible values
Principal quantum number	n	n=1, 2, 3, …
Angular momentum quantum number	l	l=0, 1, 2, … , (n-l)
Magnetic quantum number	ml	-l, … , -1, 0, +1, … , +l
Spin quantum number	ms	+1/2 or -1/2

Aufbau Principle: The order in which orbitals are filled.

(A)

(B)

Symbolic representation of beryllium element with atomic number and mass number:

Beryllium =

It has totally four electrons.

Ground state electronic configuration of beryllium =

Ans: Part A

The sets of quantum numbers are valid for an electron. Each set is ordered (n,l,m_l,m_s).

Part B

The sets of quantum numbers that describe all the electrons in the ground state of a neutral beryllium atom are arranged in their respective bins.