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| carries a positive charge, which is a defined amount of electricity. An atoms core region or nucleaus holds one or more protons. |
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| carry a negative charge and they have no contribution to an atoms mass |
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| is a radioactive isotope, it spontaneousy emits energy in the form of subatomic particles and x-rays when its nucleaus disintegrates. |
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| when a radiostope emits energy in the form of subatomic particles and x-raysit can also transform one element into another. |
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| are molecules in which a radiostope has been substituted for a more stable isotope. |
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| when an atom has vacancies in their outermost shell and they acquire, or share electrons |
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| two or more atoms of the same or different elements joined in a chemical bond |
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| are molecules that consist of two or more different elements in proportions that never do vary |
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| when atoms share two electrons; this bond is stable and much stronger then an ionic bond |
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| is a weak attraction that has formed between a covalently bound hydrogen atom and an electronegative atom in a different molecule or in a different region of the same molecule |
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| is a measure of molecular motion |
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| when individual molecules of water escape into the air or otherwise stated as hea energy converts liquid water to gaseous form. |
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| water dreading substances such as oil |
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| when somthing is showing the capacity to resist rupturing when it is streched, or placed under tension |
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