An ion with mass number 37 possesses unit negative charge. If the ion contains 11.1% more neutrons than electrons, Find the symbol of the ion.

Calculate the energy required for the process.
\({ He }_{ (g) }^{ + }\longrightarrow { He }_{ (g) }^{ 2+ }+{ e }^{ - }\)
The ionisation energy for the H atom in its ground state is -13.6 ev atom^-1

Protons can be accelerated in particle accelerators. Calculate the wavelength (in Å) of such accelerated proton moving at 2.85 x 10⁸ ms^-1 (the mass of proton is 1.673 x 10^-27 Kg).

Suppose that the uncertainty in determining the position of an electron in an orbit is 0.6 \(\mathring{A}\) . What is the uncertainty in its momentum

What is the de Broglie wave length of an electron, which is accelerated from the rest, through a potential difference of 100 V ?