Question

The discovery of neutrons came very late because

• A. Neutrons are present in nucleus
• B. Neutrons are highly unstable particles
• C. Neutrons are neutral
• D. All of these

Answer 1

The correct option is C

Neutrons are neutral

Lets try to recall how electrons and protons were discovered.

$\to$ cathode ray experiment

$\to$ canal ray experiment

In both the experiments, the results were observed because electrons and protons were charged particles.

But, neutrons are neutral particles.

So, the scientists were unable to observe neutrons.

Therefore, its discovery came very late.