BIO 1 EXAM 1 PAMELA THOMAS UCF questions with answers

BIO 1 EXAM 1 PAMELA THOMAS UCF
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questions with answers |\ |\




Isotope - CORRECT ANSWERS ✔✔-Same element and atomic
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number |\




-Different mass numbers |\ |\




EX: C12 and C13
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Mass Number - CORRECT ANSWERS ✔✔The sum of protons and
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neutrons in the nucleus of an atom |\ |\ |\ |\ |\ |\




How many naturally occurring elements are there? - CORRECT
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ANSWERS ✔✔92 |\




How many elements are essential to living? - CORRECT ANSWERS
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✔✔25


Four elements make up __% of living matter. What are they? -
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CORRECT ANSWERS ✔✔96% |\ |\




Hydrogen, Oxygen, Nitrogen, Carbon |\ |\ |\




Isomers - CORRECT ANSWERS ✔✔-Same chemical formula,
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different structure |\




-different bonding, shape, or orientation |\ |\ |\ |\




-have double-bond which prevents rotation
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, EX: C4H10
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radioactive isotope - CORRECT ANSWERS ✔✔An isotope whose
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nucleus decays spontaneously, giving off particles and energy
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____________ can be used as diagnostic tools in medicine. -
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CORRECT ANSWERS ✔✔Isotopes |\ |\




Only ______ are directly involved in chemical reactions. - CORRECT
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ANSWERS ✔✔Electrons |\




Potential Energy - CORRECT ANSWERS ✔✔Stored energy that
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results from the position or shape of an object
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The more distant an electron is from the nucleus, the greater its
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___________ __________. - CORRECT ANSWERS ✔✔Potential Energy
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How any electrons fit in the first shell? - CORRECT ANSWERS
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✔✔Two


How many electrons fit in the second shell? - CORRECT ANSWERS
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✔✔Eight


How many electrons fit in the third shell? - CORRECT ANSWERS
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✔✔Eight or Eighteen |\ |\