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Periodic Table

Who was Mendeleev? Created the periodic table in late 1800's
Mosley determined atomic #, which is how the periodic table is organized
Periods Horizontal, elements with same p.e.l are in the same period
Groups elements that have similar properties, Valance electrons
Metals groups 4-12 and groups 1 and 2 beside H and the underneath of the staircase
Non metals H, anything that comes after the staircase
Metalloids the staircase starting with B and Si
Alkali Metals Group 1, very reactive, Fr
Earth Metals Group 2
Transition Metals 4-12
Noble Gases group 18
Halogens Group 17, very reactive, F
Gases on the Periodic table N, O, F, Cl, All group 18
Liquids on Periodic Table Hg, Br
Created by: Carly M



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