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Periodic Table

QuestionAnswer
Dmitri Mendeleev Organized the elements by in creasing atomic mass and sililaf properties in 1869
Henry Moseley Rearranged the elements based of increasing atomic number which is still used today
Periodic Law Elements are arranged by increasing atomic number causing a periodic pattern in elements physical and chemical properties
Period The horiziontal rows in the table Same period = different properties Same period = same number pf occupied emergy levels 1-7
Group The vertical columns in table Same group = same properties 1-18
S and P blocks Representative elements
D blocks Transition metals
F block Inner transition metals
Metalloids They touch the staircase have both metals and nonmetals Semiconductors conduct at high temperatures or when certain substances are added
Created by: sunshine28
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