Test Bank for Human Biology 12th Edition Mader QUESTIONS AND ANSWERS

Full file at Chapter 02 Chemistry of Life Multiple Choice Questions 1. The smallest unit of an element that still retains the chemical and physical properties of that element is called A. an isotope. B. a nucleus. C. an atom. D. a molecular bond. E. a neutrino. 2. In an atom, the number of protons always equals the number A. of electrons. B. of neutrons. C. of neutron and protons. D. of quarks. E. of neutrinos. 3. Examine the section of the periodic table in Figure 2.1. Which element will behave similarly to C? A. C a B. S C. A r D. S i E. M g Full file at 4. How many elements occur naturally? A. 11 2 B. 9 2 C. 6 4 D. 3 2 E. 6 5. The atomic number of an atom is determined by the number of A. proton s. B. neutron s. C. electron s. D. protons and neutrons. E. protons and electrons. True / False Questions 6. An element cannot be broken down by chemical means. True False Multiple Choice Questions 7. Why is He over Ne in the periodic table? (Refer to Figure 2.1) A. They both have the same atomic mass. B. They both have the same number of electrons in their outermost orbital. C. They both have a full outermost orbital. D. They both have the same atomic number. E. They both have the same number of protons in their nuclei. Full file at 8. Be has an atomic number of 4 and an atomic mass of 9. How many protons does it have? A. 4 B. 5 C. 9 D. 1 3 9. What is the symbol for sodium? A. N a B. S C. S o D. N E. D m 10. An element has its outermost orbital full and contains more than 2 electrons. Which element is this? A. H e B. N e C. C D. N E. O 11. Isotopes of an element differ due to the number of A. proton s. B. neutron s. C. electron s. D. both protons and electrons. E. neutrino s. Full file at 12. Carbon dating is a common method employed in dating certain kinds of fossils. It is based upon the radioactive decay of an isotope of carbon (C14). Referring to the atomic number of carbon attained from figure 2.1, how many neutrons does C14 have? A. 2 B. 4 C. 8 D. 1 2 E. 1 4 13. What is iodine 131, used in medicine to produce various images of organs and tissues, called? A. A mixture B. A tracer C. An emulsion D. A colloid E. A sensor True / False Questions 14. Radiation can produce both positive and negative effects for humans. True False Multiple Choice Questions Full file at 15. A combination of two or more atoms of the same type is called A. an atomic unit. B. a molecule. C. a compound. D. an isotope. E. an ion. 16. Ca3(PO4)2 represents a/an A. elemen t. B. mixtur e. C. compoun d. D. isotop e. E. ato m. 17. Atoms that share electrons have what type of bonds? A. covale nt B. neutr al C. hydroge n D. colloid al E. ioni c 18. CaCl2 is a salt that forms as the result of what type of bond? A. covale nt B. hydroge n C. pola r D. nonpolar E. ioni c Full file at True / False Questions 19. Water makes up 60-70% of total body weight. True False Multiple Choice Questions Full file at 20. Hy dro ge n bo nds A. B. C. Full file at D. E. Full file at 21. Th e rea son wa ter is pol ar is bec aus e A. B. Full file at C. D. E. Full file at 22. Wh ich of the foll owi ng cha rac teri stic s of wa ter is mo st res po nsi ble for the sin kin g of the Tit ani c? A