atom pt1
Storyboard Text
- ~400 BCE, Democritus; The 1st Atomic Theory
- Everything and everything must be made of a singular thing. I'll call it an "atom", meaning "Indivisible.
- All these atoms move around in a "Void", bouncing off each other or clinging together.
- These atoms must all be made of the same material, just varying in size, shape, position, and arrangement.
- Us humans have reactions to atoms in our souls, producing something we call sensations.
- ~1808, John Dalton; Discovery of Different Elements
- All matter is made of atoms; particles that are too small to see. Atoms come in different elements with different properties.
- When mixed, only gases of the same element will repel one another, whereas different gases are indifferent.
- Atoms are all smooth solid spheres with no electric charge. They can create compounds when combined with other elements in certain ratios.
- 1913, Niels Bohr; The Revised Atom Model
- ~1830, MIchael Faraday; Atoms have Charges
- All matter is either positively or negatively charged.
- Atoms combine and create compounds through electrical bonds. Certain elements can conduct electricity better than others.
- Opposite charges attract each other. Likewise, atoms of the same charge repel each other.
- 1898, J.J. Thomson; The Discovery of the Electron
- Instead, they contain small negatively charged particles called "electrons". The rest of the atom is all positively charged
- Electrons are randomly scattered around the atom. They can be inserted or removed to adust the charge of the atom.
- Atoms are not actually composed of one solid element.
- 1911, Ernest Rutherford; The Discovery of the Nucleus
- The nucleus is composed of positively charged protons, and other unknown mass.
- Orbiting this neucleus are the electrons. The size of an atom is dependent on how large this orbit is.
- Atoms have most of their mass concentrated in the center. This part contains all of the positive charge, and most of the mass.
- By using this model, we can clearly see how many electrons there are. It is also practical and easy to illustrate.
- While the current model can describe the atom well, it doesn't do it in an efficient way.
- The farther away from the nucleus an electron is, the more energy it requires. When electrons gain or lose energy, they move to higher or lower shells.
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