Structure of At...

Bohr's theory can also be applied to the ions like :

An element with a mass number of $$81$$ contains $$31.7\%$$ more neutrons as compared to protons. Identify the element.

How many maximum spectral lines are possible if the electron is present in the 4th shell and only two atoms are present in the sample?

If the radial probability curve indicates $$2s$$ orbital, the distance between the peak points X and Y is?

The gyromagnetic ratio of an electron in an $$H-$$atom, according to Bohr model, is:-

Time taken for an electron to complete one in revolution in Bohr orbit of hydrogen atom is :

Ionization potential of hydrogen is $$13.6$$ volt. If it is excited by a photon of energy $$12.1eV$$, then the number of lines in the emission spectrum will be:

The figure shown the wavelength spectrum of x-rays produced when $$50 \ KeV$$ electrons strike a molybdenum target. The $${ K }_{ \alpha  }$$ line on the figure is represent by a number:

A substance can be identified because its chemical environment often shows up like a finger print in a spectrum. This fine region of finger prints of the chemical environment of a chemical compound is created by:

The emission spectra of atoms in the gaseous phase do not show a continuous spread of wavelength from red to violet, rather they emit light only at specific wavelengths with dark spaces between them. Such spectra is/are called: