Enlist the postulates of Bohr's atom model.

By applying Bohr's postulates, arrive at the radius of n^th orbit for hydrogen like atom

Write a note on limitations of Bohr's atom model.

Derive an equation for the wavelength of a matter wave.

List out the important features of quantum mechanical model of atom

How does the effective nuclear charge influence the stability of the orbital?

The electronic configuration of Cr and Cu are written as 3d⁵ 4s1 and 3d¹0 4s¹ instead 3d⁴ 4s² and 3d⁹ 4s² Justify the statement

The quantum numbers of six electrons are given below. Arrange them in order of increasing energies.If any of these combination(s) has/have the same energy lists.
(i) n = 4, l = 2, m₁ = -2, m_s =  - \(\frac { 1 }{ 2 } \)
(ii) n = 3, l = 2, m₁ = 1, m_s = +\(\frac { 1 }{ 2 } \)
(iii) n = 3, l = 1, m₁ = 0, m_s = +\(\frac { 1 }{ 2 } \)
(iv) n = 3, l = 2, m₁ = -2, m_s = - \(\frac { 1 }{ 2 } \)
(v) n = 3, l = 1, m₁ = -1, m_s = + \(\frac { 1 }{ 2 } \)
(vi) n = 4, l = 1, m₁ = 0, m_s =  +\(\frac { 1 }{ 2 } \)

A neutral atom of an element has 2K, 8L and 5M electrons. Find out the following.
(i) Atomic number of the element 
(ii) Total number of s-electrons 
(iii) Total number of p-electrons
(iv) Number of protons in the nucleus 
(v) Valency of the element

Determine the following for the fourth shell of an atom.
(a) The number of subshells
(b) The designation for each subshell
(c) The number of orbitals in each subshell
(d) The maximum number of electrons that can be contained in each subshell

Calculate the uncertainty in the velocity of a wagon of mass 3000 kg whose position is known to an accuracy of ±10 pm.(Planck's constant = 6.626 x 10^-34 kg m² S^-1)

The uncertainty in the position and velocity of a particle are 10^-2 m and \(5.27\times { 10 }^{ -24 }{ ms }^{ -1 }\) respectively. Calculate the mass of the particle

Calculate the product of the uncertainties of displacement and velocity of a moving electron having a mass of 9.1 X 10^-28 g

Calculate the uncertainty in position of a dust particle of mass 0.1 mg if the uncertainty in velocity is \(5\times { 10 }^{ -19 }{ ms }^{ -1 }\)

The uncertainty in the position and velocity of a particle are 1 nm and 5.27\(\times\)10-2⁴ ms^-1 respectively. Calculate the mass of the particle.

A beam of helium atoms moves with a velocity of 2.0 \(\times\) 10³ ms^-1 .Find the wavelength of the particles constituting the beam (h = 6.626\(\times\)10^-34 Js)

Define the following terms with examples.
(i) Isotopes
(ii) Isotones
(iii) Isobars
(iv) Isoelectronic species
(v) Nucleon

Complete the table given below

S.No	Symbol	Mass No.	Atomic No	Proton	Neutron	Electrons
1.	Zn2+	64	30	-	-	-
2.	Cl-	35	-	-	18	18
3.	Ar	-	-	18	22	1

Calculate the wavelength of the radiations emitted when an electron in a hydrogen atom undergo transition from 4th energy level to the 2nd energy level.

Calculate the de Broglie wavelength of an electron that has been accelerated from rest through 1potential differences of 1 KV.