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?

Explanation

To solve the problem step by step, we will analyze the total energy of the electron in the first excited state of a hydrogen atom, which is given as -3.4 eV.

### Step 1: Understand the relationship between total energy, kinetic energy, and potential energy.
The total energy (E) of an electron in an atom is given by the sum of its kinetic energy (KE) and potential energy (PE):
\[ E = KE + PE \]

From atomic physics, we know that:
\[ PE = -2 \times KE \]
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