Philosophers

Question 1

discover a particle and named it the ATOM the greek word atomos meaning not able to be divide. HE thought the atom is so small that it would not be able to cut/divided. through observations he mad this theory not through actual experimentation.

Answer 1

Democritus

Question 2

did not agree with democritus and beleived that you would never end up with a particle that could not be divided. Democritus was right!

Answer 2

Aristotle

Question 3

performed experiments to prove the Atomic Theory. He combined different elements in certain proportions to create compounds. Developed three key compontents

• All substances are made of atoms. Aatoms are small particles that cannot be created, divided or destroyed.
• Atoms of the same elements are exactly alike, and atoms of diferent elements are different.
• Atoms join with other atoms to make new substances.

Answer 3

Dalton

Question 4

Discovered there are small particles inside the atoms. Meaning that atoms can be divided into even smaller parts. He used and experiment with a Cathode-ray tube to prove his theory. He proved that negatively charged particles are present in every kind of atom. The negatively charged particles are called electrons

Answer 4

Thomson

Question 5

“shooting gallery” experiment proved that atoms consist mostly of empty space with a tiny space made of dense particles now called the nucleus

Answer 5

Rutherford

Question 6

Model predidcted that electrons move around the nucleus in a certain path or energy level

Answer 6

Bohr

Question 7

disproved Bohrs theory and present day experimentss prove that electrons move in randomly in a space withing the atoom also know as the electron cloud. this is our present day model

Answer 7

Schrodinger and Heisenberg