Bio 2010 - Microbiology » Summer 2021 » Chapter 2 Quiz

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
A pure substance that is composed of a unique atomic arrangement is called an:
A.   matter
B.   an element
C.   a solid
D.   a compound
Question #2
Which of the following types of bonds can be dissociated by water?
A.   nonpolar covalent bonds
B.   hydrogen bonds
C.   ionic bonds
D.   polar covalent bonds
Question #3
What does a buffer do?
A.   It maintains the amount of base in a solution.
B.   It keeps the pH of a solution from changing very much.
C.   It maintains the amount of acid in a solution
D.   It prevents the pH of a solution from changing at all.
Question #4
Which are the outermost electrons of an atom?
A.   Ionic electrons
B.   Covalent electrons
C.   Valence electrons
D.   Electric electrons
Question #5
_________ are substances composed of two or more different atoms bonded together. chemically.
A.   Compounds
B.   Ions
C.   Isotopes
D.   Elements
Question #6
As the concentration of hydrogen ions increases, the pH goes:
A.   down and the solution becomes more acidic
B.   up and the solution becomes more acidic
C.   up and the solution becomes more basic
D.   down and the solution becomes more basic
Question #7
Anything that occupies space and has mass is called:
A.   an element
B.   a compound
C.   matter
D.   a solid
Question #8
In most atoms the number of protons and electrons is
A.   different, with the number of electrons being greater.
B.   different, with the number of protons being greater.
C.   the same.
D.   variable, depending upon the atomic mass of the element.
Question #9
On the Periodic table of Elements, potassium’s (K) atomic number is 19. It also is in the first group and has four periods. Which of the following is the correct electron configuration for potassium?
A.   2, 8, 12, 1
B.   2, 12, 4, 1
C.   2, 4, 4, 8 ,1
D.   2, 8, 8, 1
Question #10
A chemical bond formed by the equal sharing of one or more pairs of electrons between outer shells of two atoms is called a(n):
A.   hydrogen bond
B.   polar covalent bond
C.   non-polar covalent bond
D.   ionic bond

Need help with your exam preparation?

Existing Quiz Clients Login here