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| when the number of protons= the number of electrons, the atom is _______ |
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| pure substance containing only one kind of atom |
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| elements can combine with other elements, therefore elements are not _______ |
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| What elements are organisms or found in organisms |
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| number of protons + the number of neutrons |
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| the smallest part of an element |
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| a basic chemical substance on the periodic table of elements, they have only one type of atom |
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| 2 or more atoms chemically joined together |
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| a molecule made up of two or more elements bonded together in a fixed ratio |
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| forms of an element with different numbers of neutrons, and thus different mass numbers |
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| ________ atoms have unpaired electrons in their outermost shell |
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| _________ does not follow the octet rule |
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| how many electrons does hydrogen have on the outside? |
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| order the bonds from strongest to weakest |
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covalent ionic hydrogen hydrophobic van der waals |
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| the amount of energy needed to separate two bonded or interacting atoms under physiological conditions |
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| electrically charged particles, when atoms gain electrons |
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