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An isotope has an atomic number of 8 and an atomic mass number of 18. how many neutrons does it have?
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Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated
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An isotope has an atomic number of 8 and an atomic mass number of 18. how many neutrons does it have...
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