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Periodic Table

Periodic Table. People. Mendeleev-Russian scientist that published the first modern PT based on atomic mass. Moseley-British scientist that rearranged the PT by atomic number. 2. Symbol-1, 2 letter abbreviation Element name Atomic Number-p+, e-

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Periodic Table

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  1. Periodic Table

  2. People • Mendeleev-Russian scientist that published the first modern PT based on atomic mass. • Moseley-British scientist that rearranged the PT by atomic number

  3. 2 Symbol-1, 2 letter abbreviation Element name Atomic Number-p+, e- Atomic mass-Average mass of p+ and n in nucleus (Mass #) Electron Arrangement Element Squares 6 C Carbon 1s22s22p2 12.01

  4. Periods • Horizontal rows • 7 periods • Periods correspond w/ # of energy levels an element has • The lanthanide and actinide series (on bottom) are pulled out and placed on the bottom to save space.

  5. Groups/Families • Vertical columns • 18 groups • Also called families because each group has similar properties because they have the same # of e- in the outer energy level.

  6. Metals • Solid • Shiny • Good conductors of heat and electricity • Malleable • Ductile • Usually corrode • Usually have 1, 2, or 3 valence e-

  7. Nonmetals • Can be solids, liquids or gases • Dull (not shiny) • Brittle, powdery • Poor conductors • Usually 5, 6, 7, or 8 valence e-

  8. Metalloids • Have properties of both metals and nonmetals • Next to zig-zag line • Often used as semiconductors in computers • B, Si, Ge, As, Sb, Te, At

  9. Alkali Metals • Group 1 • Highly reactive • Soft, shiny, silver-white • Good conductors • 1 Valence e-

  10. Alkaline Earth Metals • Group 2 • Highly Reactive • Soft, silver-white, shiny • Give off bright colors when burned • 2 Valence e- in outer most energy level

  11. Transition Metals • Found in middle of PT • 3B-12B • Not as reactive as alkali • Valance e- are present in more than one shell • Usually 1 or 2 valance e- in outer most shell

  12. Halogens • Group 17 (7A) • 7 valance electrons • Very reactive • Most reactive nonmetals • Mostly gases

  13. Noble Gases • Group 18 (8A) • Gases • 8 Valence e- (except He) • Unreactive because of full e- shell • Also called “inert”

  14. Lanthanide Series • Classified as Rare Earth Metals • Found naturally on earth • Soft, silver-white malleable metals with high luster (shine) and conductivity. • Very reactive • Found on bottom of PT

  15. Actinide Series • Radioactive • Metals • Most are man made • Found on bottom of PT

  16. Label on your Periodic Table • Metals • Nonmetals • Metalloids (stair step) • Valence electrons • Group Number • Period Number • Transition Metals • Halogens • Noble Gases • Alkali Metals • Alkaline Earth Metals • Rare Earth Elements • Lanthanoid Series • Actinoid Series

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