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101samples08 - Biology 101 Sample questions Multiple choice...

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Biology 101 Sample questions Multiple choice: Choose the most appropriate answer. 1. An atom with an atomic number of one and an atomic weight of 3 has a) 1 proton, 1 electron and 1 neutron. b) 1 proton, 1 electron and 2 neutrons. c) 1 proton, 1 electron and 3 neutrons. d) 3 protons, 3 electrons and 0 neutrons. 2. How many electrons would be expected in the outer energy level of an atom with atomic number 5? 4. In the structure on the right, a careless scientist O-C=C-N has left out some atoms - all of them hydrogens: How many hydrogen atoms must be added to correctly complete the structure so that all valences are correct? 6. How many unpaired electrons are in the outer shell of nitrogen? 9. Which of the following is a polar covalent bond?
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