2.1 Atoms, Ions, Molecules

Question 1

Who is Democritus ?

What is his theory?

Answer 1

Philosopher Democritus said that The material World is made up of tiny indivisible particles that he called ATOMOS. Or Atom. Meaning indivisible.

Question 2

What are the four parts of Daltons atomic theory of matter?

Answer 2

1. Each element is composed of extremely small particles called Atoms.
2. All atoms of a given element are identical, but the Atoms of one element are different from the Atoms of another element.
3. Atoms when combined follow the law of constant composition. Which is the total mass of materials present after a chemical reaction is the same as the total mass present before the reaction.
4. Atoms of one element cannot be changed into Atoms of a different element by chemical reactions, atoms are neither created nor destroyed in chemical reactions.