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(#1) Democritus (born in Abdera, Greece 460 BC.-370 BC)

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(#1) Democritus (born in Abdera, Greece 460 BC.-370 BC)

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- "Father of Modern Science"
-His theory was about how all matter consisted of tiny, invisible particles (he called them atoms). He learned that atoms are all made of the same material (different in shape and size). That everything is made up of atoms. That there is not an exact number of how many there are (infinite) and how they are all indestructible. Between atoms lies an empty space.
-His theory was developed in 442 BC
- He  believed that space was limitless and that the whole universe was made up of atoms
- He discovered or created his theory by the help of his teacher, Leucippus (he got the idea that all matter consisted of tiny, indivisible particles)

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- He was the one to bring back the idea of the atom (Democritus's idea had been ignored for a while)
- Theory discovered in 1803
- His theory was that everything (all matter) is made up of atoms. They are the smallest particles of matter. They cannot be divided into smaller pieces. Lastly, cannot be created/destroyed. He developed this theory from an article he wrote called Manchester Literary and Philosophical Society.
-Scientists discovered his model of the three wooden balls were too simple and did not fully explain the idea of subatomic particles

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- Rutherford was well known for discovering the nucleas. He also later discovered protons.
- His theory was that the atom has a tiny, heavily, charged nucleus that is surrounded by a largely empty space (discovered that most of the space in the atom is empty) with tiny electrons circling around it.
- 1911 was when he discovered his theory and created the Rutherford model or also called planetary model.
- He discovered or created his theory by his experiment known as the gold foil experiment where he showed that the atom has a charged nucleus.

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- The first subatomic particles were discovered in 1897 by Joseph Thomas. These were known as electrons
- He created experiments and saw the negative particle were all alike and smaller than atoms. He later figured out that those negative particles are apart of the atom because they are alike and all units of matter are not all alike. Later they became known electrons. - He discovered this theory in 1897.
- He discovered his theory by doing experiments with Crookes, or cathode ray, tube (figured out they were negatively charged). He created the plum pudding model.

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- 1913 is when Niels Bohr discovered his theory that energy (hydrogen atom) is transferred only in specific well defined amounts.
- He learned that electrons move around the nucleus but only in recommended orbits, when moving from one orbit to another with lower energy, a light quantum is released.
- He lived in Copenhagen, where he did most of his research and experiments, he even graduated college there and recieved his masters and doctorate degree in physics. There he created the Bohr model (showed how electrons orbit the nucleus)

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- He discovered his theory in  1926
-His theory was to use mathematical equations to find a certain location of electrons in an atom. He created wave equations for electron movements.
- He created an atomic model known as the quantum mechanical model (it predicts the odds of the location of  the electron)
-  He discovered his theory in Vienna, Austria where he was born, he took the idea of the Bohr model a little further.