a) \[n=4,l=1,m=-1,m_{s}=+\frac{1}{2}\] b) \[n=4,l=1,m=0,m_{s}=+\frac{1}{2}\] c) \[n=4,l=1,m=2,m_{s}=+\frac{1}{2}\] d) \[n=4,l=1,m=1,m_{s}=-\frac{1}{2}\] Answer: c Explanation: \[n=4,l=1,m=2,m_{s}=+\frac{1}{2}\]
View QuestionThe uncertainty in the momentum of an electron is 1.0 × 10^-5 kg ms^-1. The uncertainty in its position will be h = (6.62 ×10^-34 kgm^2 s^-1)
The uncertainty in the momentum of an electron is \[1.0 × 10^{-5}kg ms^{-1}\] . The uncertainty in its position ...
View QuestionIn a Bohr model of an atom, when an electron jumps from n = 3 to n = 1, how much energy will be emitted?
a) \[2.15 ×10^{-11}ergs\] b) \[2.389 ×10^{-12}ergs\] c) \[0.239×10^{-10}ergs\] d) \[0.1936×10^{-10}ergs\] Answer: d Explanation: \[0.1936×10^{-10}ergs\]
View QuestionThe third line of the Balmer series, in the emission spectrum of the hydrogen atom, is due to the transition from the
a) fourth Bohr orbit to the first Bohr orbit b) fifth Bohr orbit to the second Bohr orbit
View QuestionIf travelling at same speeds, which of the following matter waves have the shortest wavelength?
a) Electron b) Alpha particle\[\left(He^{2+}\right)\] c) Neutron d) Proton Answer: b Explanation: Alpha particle\[\left(He^{2+}\right)\]
View QuestionIf E1,E2 and E3 represent respectively the kinetic energies of an electron and an alpha particle and a proton each having same de-broglie wavelength then
If \[E_{1},E_{2} and E_{3}\] represent respectively the kinetic energies of an electron and an ...
View QuestionChlorine exists in two isotopic forms, Cℓ−37 and Cℓ−35 but its atomic mass is 35.5. This indicates the ratio of Cℓ−37 and Cℓ−35 is approximately
Chlorine exists in two isotopic forms, \[C\ell-37 and C\ell-35\] but its atomic mass is 35.5. This indicates the ...
View QuestionWhich of the following pairs have identical values of e/m?
a) A proton and a neutron b) A proton and deuterium c) Deuterium and an \[\alpha\] -particle d) An electron and \[\gamma\]-rays
View QuestionWhich of the following element has least number of electrons in its M-shell?
a) K b) Mn c) Ni d) Sc Answer: a Explanation: K = 19 = 1s22s22p63s23p6s1 3s23p6 = m-shell = k ...
View QuestionThe magnetic quantum number specifies
a) Size of orbitals b) Shape of orbitals c) Orientation of orbitals d) Nuclear Stability Answer: c Explanation: The ...
View Question