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| Levels of chemical organization are |
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| Atoms,elements, molecules , and compounds |
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| positively charged particle in nucleus |
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| non-charged particle in nucleus |
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| number of protons in the nucleus determines the type of atom |
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| regions surrounding atomic nucleus that contain electrons |
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| negatively charged particle |
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| Energy levels contain what |
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| up to eight electrons in each level |
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| energy levels increases with |
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| a pure substance made up of only one kind of atom |
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| a group of atoms bound together in a group |
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| substances whose molecules have more than one kind of atom |
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| form to make atoms more stable |
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| Chemical bonds outermost energy level of |
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| electrons or donate or borrow them to become stable |
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| when an atom gains or loses elecrons in its outer energy level to become stable |
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| has lost electrons indicated by superscript positive sign(s) as in Na+ or Ca++ |
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| has gained electrons indicated by superscript negative sign(s)as in CI- |
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| Ionic bonds form when psositive and negative ions attract each other because of |
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