HW#2 - Biology Honors Prentice Hall Textbook by...

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Biology Honors Prentice Hall Textbook by Miller/Levine PG.57 (1-36), PG.59 (1-10) 9/17/09 Period 2 1. C 2. D 3. B 4. B 5. B 6. D 7. C 8. C 9. A 10. D 11. Atoms are the basic unit of matter. Atoms of the same type combine to form elements. Elements of same or different types chemically combine to form compounds. 12. A radioactive isotope is an isotope ( atoms of the same element that differ in the number of neutrons they contain) which has an unstable nuclei and breaks down at a constant rate over time. The radiation from certain isotopes can be used to treat cancer and to kill bacteria that cause food to spoil. 13. Atoms in compounds are held by chemical bonds: either ionic or covalent. 14. In covalent bonds, when atoms share two electrons, the bond is called a single covalent bond. Sometimes the atoms share four electrons and form a double bond, and atoms can even share six electrons and form a triple bond. 15. Cohesion is an attraction between molecules of the same substances. The strong attraction between water molecules from cohesion produces a force sometimes called surface tension, which can support very light objects. 16. Solutions are a type of mixture in which the components are evenly distributed throughout
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This note was uploaded on 01/02/2012 for the course BIO 101 taught by Professor Dr.chan during the Fall '11 term at Marine Biological Laboratory.

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HW#2 - Biology Honors Prentice Hall Textbook by...

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