Question
Physics Question on Atoms and Nuclei
The kinetic energy of an electron in the ground level in hydrogen atom is K units. The values of its potential energy and total energy respectively are_______
Fill in the blank with the correct answer from the options given below.
A
-2K; -K
B
+2K; -K
C
-K; +2K
D
+K; +2K
Answer
-2K; -K
Explanation
Solution
In a hydrogen atom, the potential energy (PE) of an electron in the ground state is -2 times the kinetic energy (KE), and the total energy is the sum of KE and PE, which equals -K. Hence, the correct answer is Option 1.