Question

The lowest Bohr orbit in hydrogen atom has

• A. the maximum energy
• B. the least energy
• C. infinite energy
• D. zero energy

Answer 1

Answer: (B)

The energy of $n^{th}$ Bohr orbit in hydrogen atom is
$E_n=-\frac{13.6}{n^2}eV$
For lowest orbit, $n=1$
$\therefore E_1=-13.6eV$
For highest orbit, $n=\infty$
$\therefore E_n=0eV$
Thus, the lowest Bohr orbit in hydrogen atom has the least energy