Question
Chemistry Question on atom structure models
The energy of second orbit of hydrogen atom is -5.45x10-19 J. What is the energy of first orbit of Li2+ ion (in J)
A
-1.962x10-18
B
-1.962x10-17
C
-3.924x10-17
D
-3.924x10-18
Answer
-1.962x10-17
Explanation
Solution
The correct option is: (B): -1.962x10-17
The energy levels of electrons in hydrogen-like atoms (atoms with a single electron, similar to hydrogen) are governed by the formula derived from the Bohr model:
E = -Z^2 * (13.6 eV) / n^2
Where:
- E is the energy of the electron level
- Z is the atomic number (number of protons) of the nucleus
- 13.6 eV is the ionization energy of hydrogen
- n is the principal quantum number of the orbit