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Definition
smallest stable part of an element
-protons
-electrons
-neutrons
(all are 3 basic parts of an atom) |
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Definition
| found in nucleus, positive charge, massive(relatively), identity of atom is determined by # of protons |
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| found in nucleus, no charge, about the same size mass as proton, act like packing material for protons, changing # of neutrons in energy levels |
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Definition
| found outside nucleus in energy levels, negative charge, small, determine chemical properties of atom (particularly outer electrons called valence electrons) |
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Definition
| areas with in an energy level where electrons are likely to be found |
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Definition
| spherical, lowest energy (1st to fill), holds 2 electrons |
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Definition
| 3 sets of 2 electrons each (total of 6 maximum) |
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Definition
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Term
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Definition
3p orbitals=
1s orbital= total 8 electrons |
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Term
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Definition
| electrons fill lowest energy orbitals first |
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Term
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Definition
| organizes elements to make trends easier to see |
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Term
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Definition
| vertical columns, all elements in a group contain the same # of valence electrons, have similar chemical properties |
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Term
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Definition
| horizontal row, all elements in a period have the same # of energy levels |
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Term
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Definition
| atom that has gained or lost electrons |
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Definition
| positive charge, has lost electrons |
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Definition
| negative charge, has gained electrons |
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Definition
| atoms of the same element with different #'s of neutrons(different atomic masses0 |
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Definition
| left side of the periodic table, solid at room temperature, high melting and boiling points, all form cations, shiny, malleable, ductile, good conductors of heat and electricity |
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Term
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Definition
| right side of the periodic table, gases or liquids at room temp., low melting/boiling points, form anions when they ionize, bad conductors, but good insulators |
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Term
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Definition
mass in grams of 1 mole of a substance
element-atomic mass(rounded) |
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Term
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Definition
| mass in grams of 1 mole of a compound, sum of atomic mass of all atoms in 1 molectule |
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