If the total energy of an electron is `-1.51 eV` in hydrogen atom then find out `K.E,P.E.`, orbit radius and velocity of the electron in that orbit.

Explanation

To solve the problem step by step, we will find the kinetic energy (K.E.), potential energy (P.E.), orbit radius, and velocity of the electron in a hydrogen atom given that the total energy (E) is -1.51 eV.

### Step 1: Calculate Potential Energy (P.E.)
The potential energy (P.E.) of the electron in a hydrogen atom is related to the total energy (E) by the formula:
\[ P.E. = -2 \times E \]

Given:
\[ E = -1.51 \, \text{eV} \]
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