Problems with Solutions

True and False

Problem:

All electromagnetic radiations have same energy.

Different electromagnetic radiation have different wavelengths, hence different energy

Bohr’s model is applicable for species having one electron like H, He⁺, Li²⁺.

Specific charge of cathode rays remains same irrespective of the gas used in the discharge tube.

Cathode rays contain electrons which remains same with every gas.

Isoelectronic species have same electronic configuration.

Isoelectronic species have same number of electrons.

Atoms with same atomic number but different number of neutrons are called isotopes.

Isotopes have same atomic number but different atomic mass. 

The mass of positron is ___________ electron.

With increasing principle quantum number, the energy difference between adjacent energy levels in H-atom _________.

If the magnetic moment of an ion Aⁿ⁺ is 5.9, then the number of unpaired electrons present in Aⁿ⁺are ____________

Five. Applying µ = √n(n+2), where n = 5

s-electrons are more penetrating than p-electrons. The energy required to abstract s-electrons is ____________ than for p electrons.

The wavelength of the first spectral line in Paschen series for H-atom is____________

For Paschen seriesn₂=4, n₁ = 3