Chapter 2 Questions bio

Chapter 2 Questions - Chapter 2 The Chemical Basis of Life I Atoms Molecules and Water Student 1 These are the smallest units of matter that form

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Chapter 2 The Chemical Basis of Life I: Atoms Molecules and Water Student: ___________________________________________________________________________ 1. These are the smallest units of matter that form all chemical substances and that cannot be further broken down by chemical reactions. A. protons B. neutrons C. electrons D. atoms E. molecules 2. The atomic number of an atom is A. the number of protons in the atom. B. the number of neutrons in the atom. C. the number of protons and electrons in the atom. D. the number of protons and neutrons in the atom. E. None of these choices are correct. 3. Oxygen has an atomic mass of 16 and an atomic number of 8. A. Oxygen has 16 neutrons. B. Oxygen has 8 electrons. C. Oxygen can form two bonds with other atoms. D. Oxygen has 16 neutrons and 8 electrons. E. Oxygen has 8 electrons and can form two bonds with other atoms. 4. The nucleus of an atom is composed of A. protons. B. neutrons. C. electrons. D. protons and neutrons. E. protons and electrons. 5. Ernest Rutherford's key experiment on alpha particle bombardment of gold foil was important to the development of A. detection methods for protons. B. alpha particle emitters. C. gold as an element. D. the modern model for atomic structure. E. the concept that atoms have a homogenous distribution of protons throughout the atom.
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6. The first, inner-most energy shell of an atom A. can have a maximum of 8 electrons. B. can have a maximum of 2 electrons. C. is called the 2p orbital. D. is called the 1s orbital and can have a maximum of 8 electrons. E. is called the 2p orbital and can have a maximum of 2 electrons. 7. If carbon has an atomic mass of 12 and an atomic number of 6 then it has A. 6 electrons. B. 12 electrons. C. 18 electrons. D. as many as 6 but no more than 12. E. None of the choices are correct. 8. Tritiated hydrogen ( 3 H) differs from hydrogen ( 1 H) in that A. 3 H has 2 more protons than 1 H. B. 3 H has 2 more electrons than 1 H. C. 3 H has 2 more neutrons than 1 H. D. 3 H has the same number of neutrons as 1 H. E. 3 H has a different electron configuration than 1 H. 9. Isotopes are different forms of the same element that A. differ in their number of neutrons. B. have the same numbers of protons.
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This note was uploaded on 10/29/2010 for the course BIO 1300 taught by Professor E.m during the Spring '10 term at N.C. Central.

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Chapter 2 Questions - Chapter 2 The Chemical Basis of Life I Atoms Molecules and Water Student 1 These are the smallest units of matter that form

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