According to the Aufbau’s principle, which of the following orbital should be filled first?

If the kinetic energy of an electron is 5J. Find out its wavelength.

Which of the following condition is suitable for cathode ray discharge tube?

If the number of protons and neutrons of an element is 13 and 14 respectively, then what’s the atomic number(Z) an…

Find out the wavenumber, when an electron jumps from 2nd orbit to 1st.

The uncertainty of a ball is given by 0.5A°. Then calculate the uncertainty in momentum.

What is the wavenumber of violet color?

How many electrons can exist with the principal quantum number’s value as 4?