PRACTICE QUIZ ON INORGANIC CHEMISTRY

Instructions: You may prefer to print out the quiz and mark it.  After you have finished marking the quiz, you can grade each question by clicking on a quiz answer.   When you click on a quiz answer, you will be given feedback indicating whether your answer is correct.  When you get a feedback response, click on the back arrow to return to the quiz. After scoring your quiz, you should have an idea if you need to study the material more.  Remember to post questions about things you don't understand in the Class Forum.

1-4.    Characterize the substances in questions 1-4 by matching them with the correct descriptor.

1.    CO₂
      a.  atom         b.  molecule         c.  compound         d.  ion

2.    O₂
      a.  atom         b.  molecule         c.  compound         d.  ion

3.    H⁺
        a.  atom         b.  molecule         c.  compound         d.  ion

4.    C^o
        a.  atom         b.  molecule         c.  compound         d.  ion

5.    Which of the following characteristics is associated with electrons?
        a.  positive charge                        b.  located in the nucleus
        c.  mass equal to a neutron         d.  negative charge

6.    A proton is located in  _____ and has an atomic weight of ______.
        a.  the nucleus; one             b.  the nucleus; zero       
        c.  electron shells; one        d.  electron shells;zero

7.    What is the chemical symbol for sodium? ___     for carbon _____  for potassium? ____

8.    An atom has an atomic number of seven.   How many electrons are in its outer shell?
        a.  2         b.  5         c.  7         d.  14

9.    An atom that gains two electrons becomes a(n)
        a.  positively charged ion                 b.   negatively charged ion       
        c.  polar molecule                             d.   covalent molecule

10.  Atom A has four electrons in its outer shell.  In the vast majority of cases, an atom of this
        type will form ______  bonds with other atoms.
        a.  polar         b.  hydrogen         c.  ionic         d.  covalent

11.  If an atom has an atomic number of 15 and an atomic weight of 31, the atom will have a total of  how many          electrons?  How many neutrons will this atom have?
        a.  15;16         b.  15;31         c.  16;31         d.  31;46

12.  Which of the following pairs of terms gives equivalent information?
        a.  isotopes;ions                                        b.  atomic weight; atomic number
        c.  proton number; atomic number          d.  isotopes; proton number

13.  An atom that has 2 electrons in its outer shell reacts with an atom that has 6 electrons in its outer shell.  The          atom that has 2 electrons in its outer shell will act as a(n) ________ and become a ______ charged ion.
        a.  electron donor; positively                 b.   electron acceptor; positively
        c.  electron acceptor; negatively           d.   electron donor; negatively

14.  When is an atom most chemically stable?
        a.  when it has an equal number of protons and electrons
        b.  when it is electrically neutral
        c.  when it has an equal number of protons and neutrons
        d.  when its outermost energy level is completely filled with electrons

15.  A solution has a pH of 4.  This solution is a(n) _____ and has an excess of _____ ions.

BIOWEB  Al BIO 101 Web Section  ELI BIO 101 Web Section 
nverdae@nvcc.edu
Emma Erdahl, Associate Professor of Biology
Northern Virginia Community College
Revised 8/23/00