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Chemistry Unit 3
Term | Definition |
---|---|
Mendeleev | organized periodic table by atomic mass |
Mosely | organized periodic table by increasing atomic number |
Metals | located on left of zig-zag line except hydrogen |
Nonmetals | located on right of line |
Metalloids | touch line except Al and Po which are both metals |
Alkai Metals | Column 1 (vertical) S-block |
Alkaline Earth Metals | Column 2 (vertical) S-block |
Transitions Metals | Columns 3-12 (vertical) D-block |
Halogens | Column 17 (vertical) P-block |
Noble Gases | Column 18 (vertical) P-block |
Lanthanides | #'s 58-71 F-block |
Actinides | #'s 90-103 F-block |
Inert | stable/non-reactive |
Atomic Size | Distance from nucleus edge. Increases as you go down and gains energy level. Decreases from left to right. Increases #of protons |
Ionization Energy | Increases from left to right and decreases going down. |
Electronegativity | Attracting electrons. Increases from left to right. Decreases from top to bottom b/c atom gets bigger. |