Structure of At...

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

If r is the radius of first orbit, the radius of nth orbit of the H atom will be

At 200°C hydrogen molecules have velocity 105 cm sec^–1. The de-Broglie wavelength in this case is approximately

The number of electrons in 3d shell for element with atomic number 26 is

In a set of degenerate orbitals the electrons distribute themselves to retain similar spins as far as possible. This statement is attributed to

If uncertainty in the position of electron is zero, the uncertainty in its momentum would be

The radius of second Bohr’s orbit is

For which of the following sets of quantum -numbers an electron will have the highest energy ?

The uncertainty in the position of an electron (mass 9.1 × 10^–28 g) moving with a velocity of 3.0 x 10⁴ cms^–1 accurate up to 0.011% will be

The radius of hydrogen atom in the ground state is 0·53 Å, the radius of ₃Li²⁺ in the similar state is