Home
Class 12
PHYSICS
Consider atoms H, He^(+), Li^(++) in the...

Consider atoms `H, He^(+), Li^(++)` in their ground states. If `L_(1), L_(2)` and `L_(3)` are magnitude of angular momentum of their electrons about the nucleus respectively then:

A

`L_(1)+L_(2)=L_(3)`

B

`L_(1) gt L_(2) gt L_(3)`

C

`L_(1) lt L_(2) lt L_(3)`

D

`L_(1) = L_(2) = L_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Angular momentum `=(nh)/(2pi)`
i.e. same for all
Promotional Banner

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.65|9 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.66|20 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.63|9 Videos

  • CURRENT ELECTRICITY

    RESONANCE|Exercise High Level Problems (HIP)|21 Videos

  • ELECTRO MAGNETIC WAVES

    RESONANCE|Exercise Exercise 3|27 Videos

Similar Questions

Explore conceptually related problems

Consider atoms H, He^(+), Li^(++) in their ground states. Suppose E_(1), E_(2) and E_(3) are minimum energies required so that the atoms H He^(+), Li^(++) can achieve their first excited states respectively, then

The angular momentum (L) of an electron in a Bohr orbit is gives as:

The angular momentum (L) of an electron moving in a stable orbit around nucleus is

Assertion: In the duration electron jumps from fist excited state to ground state in a stationary isolated hydrogen atom, angular momentum of the electron about the nucleus is conserved. Reason: As the electron jumps from first excited state to ground state, in a hydrogen atom, the electrostatic force on electron is always directed twoards the nucleus.

A Hydrogen atom and Li^(++) ion are both in the second excited state. If L_(H) and L_(Li) are their respective angular momenta, and E_(H) and E_(Li) their respective energies, then:

Consider a satellite orbiting the earth as shown in the figure below. Let L_(a) and L_(p) represent the angular momentum of the satellite about the earth when at aphelion and perihelion respectively. Consider the following relations (i) L_(a)=L_(p) (ii) L_(a)=-L_(p) (iii) r_(a)xxL_(a) =r_(p)xxL_(p) Which of the above relation(s) is/are true ?

If E_n and L_n denote the total energy and the angular momentum of an electron in the nth orbit of Bohr atom, then

A hydrogen atom and a Li^(2+) ion ae both in the second excited state . If l_H and l_(li) are their respective angular momentum in an orbit and E_H and E_(Li) are their respective enrgies, then :

A hydrogen atom and a Li^(2+) ion are both in the second excited state. If l_H and l_(Li) are their respective electronic angular momenta, and E_H and E_(Li) their respective energies, then (a) l_H gt l_(Li) and |E_H| gt |E_(Li)| (b) l_H = l_(Li) and |E_H| lt |E_(Li)| (C ) l_H = l_(Li) and |E_H| gt |E_(Li)| (d) l_H lt l_(Li) and |E_H| lt|E_(Li)|

A spherical body of radius R rolls on a horizontal surface with linear velociltly v . Let L_(1) and L_(2) be the magnitudes of angular momenta of the body about centre of mass and point of contact P . Then:

RESONANCE-DAILY PRACTICE PROBLEM-DPP No.64
  1. In a Young's double slits experiment, the slit are 1 mm apart and are ...

    Text Solution

    |

  2. Interference fringes were produced using light in a doulbe-slit experi...

    Text Solution

    |

  3. A particle is performing SHM along x-axis such that its acceleration a...

    Text Solution

    |

  4. A disc of mass m is connected with an ideal spring of spring constant ...

    Text Solution

    |

  5. Two metal spheres of same radius R are placed at a very large distance...

    Text Solution

    |

  6. A, B, C, D, E, and F are conducting plates each of area A, and any two...

    Text Solution

    |

  7. Consider atoms H, He^(+), Li^(++) in their ground states. If L(1), L(2...

    Text Solution

    |

  8. A trolley is being up an incline plane by a man inside the trolley He ...

    Text Solution

    |

  9. Which one of the following equation is correct for the circuit shown. ...

    Text Solution

    |

  10. A particle of mass 0.2 kg moves along a path given by the relation : v...

    Text Solution

    |

  11. A ball of mass m moving with velocity v, collide with the wall elastic...

    Text Solution

    |

  12. A particle P collides with 15 ms^(-1) at an angle 60^(@) from vertical...

    Text Solution

    |

  13. A cylinder of mass m radius R is spined to a clockwise angular velocit...

    Text Solution

    |

  14. A particle of charge per unit mass alpha is released from origin with ...

    Text Solution

    |

  15. A string of mass 2.50kg is under a tension os 200N. The length of the ...

    Text Solution

    |

  16. An isolated smooth ring of mass M = 2m with two small beads each of m...

    Text Solution

    |

  17. The density of a non-uniform rod of length 1m is given by rho (x) = a ...

    Text Solution

    |

  18. Two capacitors A and B are connected in series with a battery as shown...

    Text Solution

    |

  19. A hot black body emits the energy at the rate of 16 J m^(-2) s^(-1) an...

    Text Solution

    |

  20. A 25kg uniform solid with a 20cm radius respectively by a verticle wir...

    Text Solution

    |