How small is the nucleus?नाभिक कितना छोटा है?How small is the nucleus?

NCERT Section 13.1 · Class 12 Physics · Chapter 13 · interactive diagram

Parts and what they mean

• Atom (परमाणु) — Radius about 10⁻¹⁰ m. Almost all of it is empty space with electrons moving around.
• Nucleus (to scale it would be invisible) (नाभिक (पैमाने पर यह दिखेगा भी नहीं)) — Radius about 10⁴ times smaller than the atom, so its volume is about 10⁻¹² of the atom’s volume.
• Nucleus, magnified (नाभिक, आवर्धित) — Holds all the positive charge (+Ze) and more than 99.9% of the atom’s mass.
• Proton (प्रोटॉन) — Positively charged nucleon (+e).
• Neutron (न्यूट्रॉन) — Neutral nucleon, discovered by Chadwick in 1932.

Original diagram drawn by Simple Learning Hub, based on NCERT Section 13.1. Report a mistake