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Atoms Periodic Table
People, Periodic Laws, Trends
Term | Definition |
---|---|
Lavosier | - Developed first 33 Elements - Distinguished Metals and Non-Metals |
Moseley | - Reordered periodic table by atomic #'s - Modified Periodic Law |
Meyer | - Periodic Table of 56 elements - Molar Volume - Atomic Weight |
Cannizaro | - Determined atomic weights for elements |
Doberiner | Similar elements had relative atomic mass - "Triads" |
Dechancourtois | - Periodic table in a cylinder - Unbroken order of increasing weight of an atom |
Mendeleyev | Sole Originator of Periodic table - Forecasted properties of unknown elements - Organized based on chemical properties - Periodic Law |
John Dalton | -Mass of an atom was the most important property |
Seaborg | Removed heaviest elements in periodic table and put them below - "actinade - lanthinide series |
Greek Thinkers | Created words "Element" and "Atom" - Described the differences of smallest parts of matter |
Newlands | Arranged elements based on Atomic weights - Octaves |
Ionization Energy | how easy it is for an atom to receive an electron - Increases ------> - Decreases down - Has so many shells, it forgets some are there for FRancium |
Electronegativity | how strongly the nucleus pulls on electrons - Increases ------> - Decreases down - Fluorine has 7 valence electrons and not a ton of shells yet "Pauling" |
Atomic Radius | size of an atom; 1/2 distance between 2 nuclei of the same element - Decreases -------> - Increases down |