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Trends of the PT
Vocabulary for Chemistry
Term | Definition |
---|---|
Atomic Number | Increases across a period(basis of organization) Increases down a family(basis of organization) |
Atomic mass | Increases across a period Increases down a family |
Atomic Radius | 1/2 the distance between the nuclei of two like atoms. Decreases across a period(increased attraction of more positive nuclei to electron clouds) Increases down a family(addition of energy level) |
Electron Affinity | amount of energy released when an atom gains an electron Increases across a period(Stronger attraction between electrons and nucleus) Decreases down a family(adding energy levels farther from the nucleus means less attraction) |
Ionization energy | amount of energy required to remove an electron from a nuetral atom. Increases across a period(Closer to the nuclues means more energy to pull electrons away) Decreases down a family |