A. The existence of electrons
A.
B. The positive charge of the nucleus
B.
C. Stability of electrons in orbits
C.
D. Presence of neutrons
D.
Correct Answer: C
সঠিক উত্তর: C
Explanation
ব্যাখ্যা
According to classical physics, revolving electrons should lose energy and spiral into the nucleus, but atoms are stable.