periodic table december 18, 2007. mendeleev came up with the first periodic table. it was based on...
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![Page 1: Periodic Table December 18, 2007. Mendeleev came up with the first periodic table. It was based on the atomic masses, instead of atomic numbers](https://reader036.vdocuments.mx/reader036/viewer/2022062409/56649f465503460f94c67d91/html5/thumbnails/1.jpg)
Periodic TableDecember 18, 2007
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Mendeleev came up with the first periodic table. It was based on the atomic masses, instead of atomic numbers.
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Nobel Gases Will Always Have Full Outer Shells
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GROUPS ALWAYS GO UP AND DOWN
PERIODS GO LEFT AND RIGHT
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AS YOU GO ACCOSS GROUPS, YOU ADD ELECTRONS IN THE SAME ELECTRON SHELL.
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AS YOU GO DOWN THE PERIODS, YOU ADD SHELLS OF ELECTRONS TO THE ATOM.
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Metals are on the left and bottom of the chart.
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Nonmetals are on the right of the chart.
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Metalloids are where the two meet.
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Nobel Gases are on the end, with filled shells.
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The only reason these are down here, is so the table does not get too long to fit in a book, or on a wall.
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