Structure of At...

Cathode rays or cathode ray particles are

If an electron is moving with a kinetic energy of 3.96 x10^-34 J, calculate its de Broglie wavelength.

(Given: m = 9.1 x 10^-31 kg and h = 6.6 x 10^-34 kgm²s^-1)

According to Dalton’s atomic theory

The threshold frequency of a metal is 2.8 eV. If the radiation 2500 Å falls on the metal, then the kinetic energy of the emitted electron is:

An element 'X' has 16 electrons. Calculate the number of electrons present in the M-shell of the element in X^2- state.

An electron revolves around the nucleus with a velocity of 3.05 x 10⁷ ms^-1. What is the wavelength of the electron?

The radial distance between two peaks in the radial probability distribution curve of 2s-orbital is

If the speed of a tennis ball is measured as 0.76 ms^-1 and mass as 35 g, then find the uncertainty in position.

The ratio of the radii of the 3^rd orbits of He⁺ and Li²⁺ is:

Charge on the electron was determined by