Bio 2010 - Microbiology » Summer 2021 » Chapter 2 Quiz (A)

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Question #1
As the concentration of hydrogen ions increases, the pH goes:
A.   down and the solution becomes more basic
B.   up and the solution becomes more basic
C.   up and the solution becomes more acidic
D.   down and the solution becomes more acidic
Question #2
_________ are substances composed of two or more different atoms bonded together. chemically.
A.   Ions
B.   Compounds
C.   Isotopes
D.   Elements
Question #3
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.   ionic bond
D.   non-polar covalent bond
Question #4
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 #5
Which of the following types of bonds can be dissociated by water?
A.   hydrogen bonds
B.   ionic bonds
C.   polar covalent bonds
D.   nonpolar covalent bonds
Question #6
In most atoms the number of protons and electrons is
A.   the same.
B.   different, with the number of protons being greater.
C.   different, with the number of electrons being greater.
D.   variable, depending upon the atomic mass of the element.
Question #7
A pure substance that is composed of a unique atomic arrangement is called an:
A.   a compound
B.   an element
C.   a solid
D.   matter
Question #8
Which are the outermost electrons of an atom?
A.   Electric electrons
B.   Valence electrons
C.   Covalent electrons
D.   Ionic electrons
Question #9
Anything that occupies space and has mass is called:
A.   a solid
B.   matter
C.   an element
D.   a compound

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