BIOS 251 LAB Midterm

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BIOS 251 LAB Midterm

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Student: _________________________________Date:_____________________________ 1. Atoms bonded together to form a chemical unit are called A. molecules. B. ions. C. radioisotopes. D. buffers. 2. When one atom has a stronger attraction for shared electrons in a bond than the other atom, a(an) ___________ covalent bond is formed. A. polar B. nonpolar C. ionic D. metallic 3. The lower the pH, A. the greater the hydrogen ion concentration. B. the more acidic the solution. C. both the greater the hydrogen ion concentration and the more acidic the solution are correct. D. the greater the hydroxide ion concentration. E. the more basic the solution and the greater the hydroxide ion concentration. 4. Organic compounds always contain ___________ atoms. A. water B. carbon C. nitrogen D. oxygen

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Pages: 11
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