th According to Bohr s theory the energy in the n 2 176 10

1 d Find the de Broglie wavelength of the electrons that have been accelerated from rest through a potential difference of 40 kV Given electronic charge e 1 602x10 19 C me 9 109x10 31 kg 3

2 d A monochromatic X ray beam whose wavelength is 0 0558 nm is scattered in Compton scattering through an angle 46 Calculate the wavelength of the scattered beam Given h 6 626x 10 34 J s mo rest mass of electron 9 1x10 31 kg c speed of light 2 998 108 m s 4

Let s consider the case of nitrogen atoms which have the electronic configuration 18 28 2p in the ground state a Assume for now that the electrons are distinguishable particles so you don t have to worry about the symmetry of wavefunctions If we ignore the interaction between the electrons or spin orbit coupling effects what are all possible values for the total electronic quantum numbers S L and J of the highest occupied electronic shell in the ground state Here S is the total electronic spin L the total angular momentum and J the quantum number of J L S Use the spectroscopic notation 25 1L for all possible states b Now using the first Hund s rule and restoring indistinguishibility what is the total spin S of the highest occupied electronic shell in the ground state Is the spin part of the three electron ket state symmetric or antisymmetric under exchange What about the orbital part

1 For the electron in d orbital the spin angular 73 momentum is 110110 2 How many orbitals are associated with 4th 1 3 3 h 22n 15 energy 74 d eneren in scocia a fazen ETUT 1 2 2T 2 3 3 3 21 4 2 2 41 at fura

1 Compute the wavelengths for the Balmer series transitions in a hydrogen atom 3 2 all the way up to 8 2 Please write all answers in nanometers Must show all your work for at least 1 one of the transitions

In accordance with Bohr s model what is the quantum number that characterizes the earth s revolution around the sun in an orbit of radius 1 5 10 1 m with orbital speed Mass of earth 6 0 x 1024 kg 1 1 8 1076 2 2 3 1074 3 1 3 1076 4 2 6 1074

An ideal gas is expanded so that the amount of heat transferred to the gas is equal to double the decrease in enthalpy Identify option s which are corre PV12 11 constant for triatomic non linear ideal gas Cm 2Cp OTV2 13 constant for monoatomic ideal gas 7 constant

3 2 1 4 1 414 1 The mass of a particle is 100 g and its radius is 87 2 x 10 cm If its velocity is 10 cm sec with measurement the 0 0001 uncertainty in uncertainty in its position is 1 5 2 x 10 m 3 5 2 x 10 m de confic 2 5 2 x 10 m 4 5 2 x 10 m 3 2 1 30 0001 feffurcan grit 1 5 2 x 10 m 3 5 2 x 10 m 4 1 414 1 102 104 10 estionpap 2 5 2 10 4 5 2 10 m m

Name the members of the lanthanoid series which exhibit 4 oxidation states and those which exhibit 2 oxidation states Try to correlate this type of behaviour with the electronic configurations of these elements

How many orbitals are associated with 4th energy 74 level 1 4 2 9 3 16 4 7 2 2 1 4 2 4T 2 9 2 2m 3 16 4 7