Atoms and Nuclei

The wavelength of light emitted in the visible region by He\(^+\) ions after collisions with H atoms is

The quantum number n of the state finally populated in He\(^+\) ions is :

Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure. Use this plot to choose the correct choice(s) given below.

The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is

In the option given below, let E denote the rest mass energy of a nucleus and n a neutron. The correct option is

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In hydrogen-like atom $(z=11)$, $n$th line of Lyman series has wavelength A equal to the de Broglie's wavelength of electron in the level from which it originated. What is the value of $n$ ?

Highly energetic electrons are bombarded on a target of an element containing 30 neutrons. The ratio of radii of nucleus to that of Helium nucleus is \((14)^{\frac{1}{3}}\). Find
(A) Atomic number of the nucleus;
(B) the frequency of $$\mat...