One $$p-$$orbital can accommodate up to two electrons with opposite spin while $$p-$$subshell can accommodate upto six electrons.
3.
The $$L{i^{2 + }}\,ion$$ is moving in the third stationary state, and its linear momentum is $$7.3 \times {10^{ - 34}}kgm{s^{ - 1}}.$$ Angular momentum is.
A.
$$1.158 \times {10^{ - 45}}kg\,{m^2}{s^{ - 1}}$$
B.
$$11.58 \times {10^{ - 48}}kg\,{m^2}{s^{ - 1}}$$
C.
$$11.58 \times {10^{ - 47}}kg\,{m^2}{s^{ - 1}}$$
4.
If the nitrogen atom has electronic configuration $$1{s^7},$$ it would have energy lower than that of the normal ground state configuration $$1{s^2}2{s^2}2{p^3},$$ because the electrons would be closer to the nucleus. Yet $$1{s^7}$$ is not observed because it
violates.
As per Pauli Exclusion Principle "no two electrons in the same atom can have all the four quantum numbers equal or an orbital cannot contain more than two electrons and it can accommodate two electrons only when their directions of spins are opposite".
5.
Which of the following types of spectrum is best depicted by the given figure ?
The light emitted by a sample ( excited hydrogen atom or any other element ), which is passed through a prism and then separated into certain discrete wavelength is called
atomic emission spectrum.
6.
The position of both, an electron and a helium atom is known within $$1.0\,nm.$$ Further the momentum of the electron is known within $$5.0 \times {10^{ - 26}}kg\,m{s^{ - 1}}.$$ The minimum uncertainty in the measurement of the momentum of the helium atom is
By Heisenberg uncertainty Principle
$$\Delta x \times \Delta p = \frac{h}{{4\pi }}$$ ( which is constant )
As $$\Delta x$$ for electron and helium atom is same thus momentum of electron and helium will also be same therefore the momentum of helium atom is equal to $$5 \times {10^{ - 26}}kg.m.{s^{ - 1}}$$
7.
An electron can enter into the orbital when
A.
value of $$n$$ is minimum
B.
value of $$l$$ is minimum
C.
value of $$\left( {n + l} \right)$$ is minimum
D.
value of $$\left( {n + m} \right)$$ is minimum.
Answer :
value of $$\left( {n + l} \right)$$ is minimum
If two orbitals have same value for $$\left( {n + l} \right),$$ the orbital with lower value of $$n$$ will have lower energy.
9.
What will be the mass of a particle if uncertainty in its posttton is $${10^{ - 8}}\,m$$ and velocity is $$5.26 \times {10^{ - 25}}\,m\,{s^{ - 1}}\,?$$
10.
An electron, $${e_1}$$ is moving in the fifth stationary state, and another electron $${e_2}$$ is moving in the fourth stationary state. The radius of orbit of electron, $${e_1}$$ is five times the radius of orbit of electron, $${e_2}$$ calculate the ratio of velocity of electron $${e_1}\left( {{v_1}} \right)$$ to the velocity of electron $${e_2}\left( {{v_2}} \right).$$