Question

Write the ground state electronic configuration of Chromiu
Define Aufbau principle.
How many number of orbital's are allowed in 4th orbit (Sh
Give the S.l unit of Wavelength.
PART - B
nswer ALL the following questions :​

Answer 1

Explanation:

Chromium atoms have 24 electrons and the shell structure is 2.8.13.1. The ground state electron configuration of ground state gaseous neutral chromium is [Ar].3d5.4s1 and the term symbol is 7S3.

The aufbau principle, from the German Aufbauprinzip, also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels.

SI unit of wavelength: metre (m}

Answer 2

Chromium atoms have 24 electrons and the shell structure is 2.8.13.1. The ground state electron configuration of ground state gaseous neutral chromium is [Ar].3d5.4s1 and the term symbol is 7S3.

The aufbau principle, from the German Aufbauprinzip, also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s subshell is filled before the 2s subshell is occupied.

Therefore in n=4, number of subshells=4, orbitals=16 and number of electrons =32.Nov 22, 2019

Bohr's model says that, mvr=nh/2π.

As per DeBroglie's theory, λ=h/mv.

Therefore, 2πr=nh/mv=nλ. 

DeBroglie's Wavelength of electron in 4th orbit =λ.

Therefore circumference of 4th orbit =4λ.