Fundamental unit of matter - Atom

Matter consists of tiny, indivisible particles. When gold is divided, it eventually reaches a point where it cannot be divided further. Democratus named this fundamental particle 'atom', which can take various shapes. The term 'atom' comes from the Greek word 'atomio', meaning indivisible.

What are the tiny particles that matter is composed of called?

What happens when a piece of gold is divided into smaller pieces?

What is the name given to the fundamental particle that cannot be divided?

From which Greek word is the term 'atom' derived, and what does it mean?

What does the term 'indivisible' refer to in the context of atoms?