Atomic Structur...

Which of the following species will produce the shortest wavelength for the transition n = 2 to n = 1?

Suppose 10-17 Jouls of light energy is required by the interior of the human eye to see on object. How many photons of green light are needed to generate this minimum amount of energy?

Non-directional orbital is

When the frequency of light incident on a metallic plate is doubled, the KE of the emitted photo electrons will be

In an atom two eletrons move around the nuclens in circular orbit of R and 4R. The ratio of the time taken by them to complete one revolution is

A 3 p-orbital has

Calculate no. of photons emitted in 10 hrs by a 60 W sodium 1 amp

Directions: The following question has four choices out of which ONLY ONE is correct.

What will be the frequency of electron in Bohr orbit?
If v = 2.19 x 10⁵ms^-1 and r = 0.5287 x 10^-10m.

What is the speed of an electron whose de-Broglie wavelength is 0.1 nm?

Find the product of uncertainty in position and velocity for an electron of mass 9.1 x 10^-31 kg?

How many photons of light having a wavelength of 4000 Å are required to provide 1 Joule of energy?

Which one the following fundamental particles is the heaviest?

Directions: The following question has four choices, out of which ONLY ONE is correct.

The number of waves made by a Bohr electron in an orbit of maximum magnetic quantum number 3 is

Which of the following orbital notations does not have spherical node?

The distance between 3rd and 2nd orbit in the H-atom is

13.5 gm of Al when changed to Al⁺³ ion in solution, will lose

In Bohr's model of H-atom, the ratio of the period of revolution of an electron in the orbit n = 1 to the period of revolution of an electron in the orbit n = 2 is

The ionisation potential of H atom is 13.6 eV. If hydrogen atom in the ground state is excited by monochromatic light of energy 12.1 eV, what will be the number of spectral lines emitted according to Bohr's theory?

The wave length of a certain line in Balmer series is observed to be 4341Å. To what value of "n" does this correspond?

Which one is not possible?

Directions: The following question has four choices out of which ONLY ONE is correct.

The two unpaired electrons of carbon differ in terms of their ____ quantum number.

Isotopes are possible due to difference in the number of

The maximum number of electrons having n = 1, l = 0, m = 0, and s = 1/2, is