Structure of At...

Oil drop experiment is for determining the

Experiments on electrical discharge through gases ultimately lead to the discovery of

The electronic configuration 1s²2s²2p¹ belongs to

The wavelength of an electron accelerated by 100 V of potential difference is about

Cathode rays are discharged under one of the following conditions:

Which of the following is a correct statement for the Aufbau principle?

How many neutrons and protons are there in the  ¹³₆C nucleus?

For 2s orbital, the nodal surface exists at a distance _____ from the nucleus.

A 3d electron having s = + ½ can have magnetic quantum number 

Which of the following electronic configurations is not theoretically possible?

The angular momentum of an electron in f orbital is

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

Two electrons in the same atomic orbital can be distinguished by their

The energy of an orbital in a multielectron atom depends on the

The number of nodal points in the plot of R_{n, 0} versus r is equal to the value of

Which of the following statements regarding quantum numbers is not correct?

Which of the following sets of quantum numbers (n, l, m and m_s, respectively) is not possible?

A d_xy orbital is directed

Consider the ground state configuration of Cr atom (Z = 24). The total numbers of electrons with azimuthal quantum numbers l = 1 and l = 2, respectively, are

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

The maximum number of electrons in a subshell is given by the expression           

One of the following scientists was the first to discover electron

The formula E= hν is used to calculate

Directions: The r-dependent wave function of hydrogen atom is given by the expression



The above wave function depends on the quantum number(s)

Directions: The r-dependent wave function of hydrogen atom is given by the expression



The number of nodes in this wave function is

Television pictures result due to

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

Directions: The r-dependent wave function of hydrogen atom is given by the expression



One of the nodes lies at a distance r from the nucleus, where r is about

The mass of an electron is

The maximum number of 3d electrons having spin quantum number s =  is

Which of the following electronic configurations is not possible according to Hund's rule?

Around 10¹⁵ Hz corresponds to the region of the electromagnetic spectrum