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Discovered that matter is made up of atoms. Atoms are forever and can't be seen cause they are invisible, they are so small that they can't be divided any smaller.
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Atoms are different texture and shape for each element.
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The ideas of a parachute are sketched outby Leonardo Da Vinci.
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Changed Democritus's idea on atoms into a scientific theory. Atoms of an element are indentical. Atoms of different elements can combine which is then a compound. Chemical reactions occur when atoms are seperated, joined or rearagned.
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The first parachute is made.
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He discovered the law of definite proportions, also known as Proust's law, which states that in any compound the elements are present in a fixed proportion by weight.
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John Dalton's model of the atom is a tiny but indestructable particles with no internal structure.
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Discoverd how to find the electron charge and mass.
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He discovered atoms have radio activity, Some have more than others.
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Discoeverd that the electron has negative charges, and there must be positive charges somewhere for matter to be nuetral. He also invented the Plum Pudding Model.
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Electrons were stuck into a lump of positive charge, similar to raisin dough, The electrons were identified as plums and the mixture they were in was indentified as pudding.
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He discovered a way to calculate the energy of a photon. He started the invention of the Quantum theory.
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Wins the Noble Peace Prize
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Discovers the nucleus. The middle of the atom is empty space and all positive charged atoms account for the mass of the atom.
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There is a nucleus in the middle with electrons forming a cloud around it.
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He discovered that electrons move in circualr orbits with a common distance from the nucleus. Created a model called Bohr Model.
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The nucleus is in the middle and the electrons orbit it with fixed distances.
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The automobile becomes a very popular demand for people
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He thinks moving particles like electrons have some properties in common with waves.
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He explained the motion of electrons in atoms with a mathematical equation. This later leads to the electron cloud formula.
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Founder of quantum machanics, the physics of the atomis world. He also discovered the uncerntain principle of the quantum theory.
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This is the latest model and the one we go by today.
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She was the first women to fly across the Atlantic
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Confirms that neutrons exist and are neutral. Neutrons are in the Atomic nuclei along with the positively charged protons.
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The second world war begins against Germany
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The second World War is finally over
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The first slinky is invented by Betty and Richard James
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The Glue stick is invented by a German company called Henkel
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Martin Cooper invented the cell phone which is very popular today.
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MTV shows music videos for the first time.
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The twin towers are hit with planes in a terrorist attack
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He decided that all substances are made up of four basic constitutions, dryness, wetness, heat and cold.
