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Flashcards do conjunto (13)
- 1Aristotle335 BCE-Teaches the world is not made of atoms, but elements: earth, water, fire and air
- 2Plato400-BCE Came up with the word "element"
- 3Marie and Pierre Curie1890-1910 Discovered that radioctive elements lose their electrons over time. Worked with radium and polonium
- 4Avogadro1810 Discovered that a compound can have more than one atom of an element
- 5Democritus450 BCE Suggested that matter made up of atoms
- 6Lavosier1789 Developed theory of conversation of mass. "Mass of an object can never be created or destroyed
- 7Mosely1913 Came up with the modern periodic table. organized by Atomic Number
- 8Boyle1670 Elements cant be broken down, compounds are combinations of elements
- 9Millikan1923 Recieved a nobel prize for measuring the negative charge of electrons
- 10Mendeleev1789 Constructed the first periodic table of elements arranged by atomic mass
- 11Rutherford1911 Discoverrd that atoms consist of positivley charged nucleus that has electrons surronding it
- 12Einstein1905 Published the theory of relativity which explains the mass and energy in atoms
- 13Bohr1913 Discovered Number of electrons determine chemical properties. Introduced the "Solar System model of the atom"
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- FlashCards sobre Sem título, criado por Tempest 6879 em 01-12-2017.
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