When is the energy of electron regarded as zero ?

The exerted energy of the electrons at absolute zero is called

When we write expression for energy of electron in n^"th" orbit of hydrogen atom we take zero potential energy at n=oo , But potential energy depends on point in reference. If we take total energy of electron in n=1 orbit as zero then , match the following :

An electron transits from n=3 to ground state in hydrogen atom. If K, P and T are kinetic energy, potential energy and total energy of the electron respectively, which of the following statements regarding the energy of electron is/are correct?

Choose the correct statement (s) (i) The energy of an electron in an atom is always negative, because it is negatively charged. (ii) The charge of an electron in an atom is positive (iii) When an electron is at an infinite distance from the nucleus so that there is no electrical interaction , then orbitarily the energy of electron is taken to be zero (iv) As the electron moves closer to the nucleus, energy is released and so its energy becomes less than zero i.e., negative.

A : Energy of electron is taken negative R: energy of electron at infinity is zero

A : Energy of electron is taken negative R: energy of electron at infinity is zero

The total energy of an electron in the first excited state of hydrogen atom is -3.4 eV. (a) What is kinetic energy of electron in this state? (ii) What is potential energy of electron in this state? (c) Which of the answers above would change if the choice of zero of potential energy is changed?