Bohr Model Of Atom, Energy levels, Hydrogen Spectrum (Board Level)

Which of the following is true

The energy required to knock out the electron in the third orbit of a hydrogen atom is equal to

An electron has a mass of 9.1\times {{10}^{{-31}}}kg. It revolves round the nucleus in a circular orbit of radius 0.529\times {{10}^{{-10}}}metreat a speed of 2.2\times {{10}^{6}}m/s. The magnitude of its linear momentum in this motion is

In a beryllium atom, if a₀ be the radius of the first orbit, then the radius of the second orbit will be in general

The ionization potential for second He electron is

The energy required to remove an electron in a hydrogen atom from n=10 state is

Which of the following particles are constituents of the nucleus

The particles which can be added to the nucleus of an atom without changing its chemical properties are called

The neutron was discovered by

The mass number of a nucleus is