TEST BANK FOR ALCANO’S FUNDAMENTALS OF MICROBIOLOGY 9 EDITION.

Chap02, Chapter 2 Multiple Choice 1. What are the six most common elements needed in large amounts in living things? A. Carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur B. Carbon, hydrogen, oxygen, sodium, calcium and nitrogen C. Carbon, hydrogen, nitrogen, oxygen, potassium and sodium D. Hydrogen, copper, zinc, oxygen, iron, manganese and sodium Ans: A 2. The smallest indivisible part of an element is the A. atom. B. isotope. C. electron. Downloaded by: Ariah | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 29 All information provided for reference only Join us on F D. neutron. Ans: A 3. The mass number of an atom is determined by adding the number of A. protons and electrons. B. neutrons and protons. C. isotopes and protons. D. electrons and neutrons. Ans: B 4. All the following are components of an atom except A. electrons. B. neutrons. C. lipids. D. protons. Ans: C 5. What is the densest part of an atom that has the greatest amount of the mass of the atom? A. Electron cloud B. Electron shell C. Atomic nucleus D. Orbit Downloaded by: Ariah | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 30 All information provided for reference only Join us on F Ans: C 6. What makes up the atomic number of an element? A. Electrons + protons. B. Protons. C. Neutrons. D. Neutrons + protons. Ans: B 7. What makes up the atomic weight of an element? A. Electrons + neutrons. B. Protons. C. Electrons. D. Neutrons + protons. Ans: D 8. How many electrons are in a neutral atom? A. The same number as the neutrons in the atom B. The same number as the protons in the atom C. The same number as the neutrons plus the protons D. You can't tell, it varies from one atom to the next. Downloaded by: Ariah | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 31 All information provided for reference only Join us on F Ans: B 9. What is the difference between a sodium ion and a sodium atom (or for any element)? A. Number of electrons they possess B. Placement of their neutrons C. Number of neutrons they possess D. Number of protons in the atomic nucleus Ans: A 10. What do you get when an atom gains an electron? A. An isotope B. A cation C. An anion D. An ionic bond Ans: C 11. Carbon enters into an enormous number and variety of chemical combinations partly because A. it has four electrons in its outer shell. B. it has no protons in its nucleus. C. it is part of a protein molecule. D. it forms isotopes. Ans: A Downloaded by: Ariah | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 32 All information provided for reference only Join us on F 12. What is an inert element? A. An element where the proton number and neutron number are equal B. An element where the atomic number is higher than its atomic weight C. An element that forms ions occurs readily D. An element where the outer shell will not hold additional electrons, so it is stable Ans: D 13. The formation of a chemical bond that combines atoms in molecules depends in large measure on the A. number of neutrons. B. number of electrons in the shells. C. presence of organic matter in the environment. D. proton configuration of the nucleus. Ans: B 14. What happens in the formation of an ionic bond? A. The addition of neutrons B. A loss of protons C. A transfer of electrons D. All of the above are correct. Ans: C Downloaded by: Ariah | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 33 All information provided for reference only Join us on F 15. What happens when one atom has electrons that end up in the electron orbit of another atom? A. They form a covalent bond. B. They form a hydrogen bond. C. They form an ionic bond. D. They form a strong bond. Ans: C