structure of atom 9th chemistry

Chapter 2 STRUCTURE OF THE ATOM – 9th Class Chemistry Notes

Q#1) What is atom? Write in short words about history of atoms? Answer: In 585 B.C, Ancient Greek philosopher Democritus suggested that matter is composed of tiny indivisible particles called atoms.The name ATOM was derived from the Latin word Atomos meaning indivisible. Daltons Atomic Theory : In 1808 John Dalton put forward his Atomic Theory. According to this theory …

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