Bio 2010 - Microbiology » Spring 2023 » Chapter 2 Quiz
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Question #1
Which are the outermost electrons of an atom?
A.
Covalent electrons
B.
Valence electrons
C.
Electric electrons
D.
Ionic electrons
Question #2
What does a buffer do?
A.
It prevents the pH of a solution from changing at all.
B.
It prevents the pH of a solution from changing at all.
C.
It maintains the amount of acid in a solution
D.
It keeps the pH of a solution from changing very much.
Question #3
In most atoms the number of protons and electrons is
A.
different, with the number of protons being greater.
B.
different, with the number of electrons being greater.
C.
variable, depending upon the atomic mass of the element.
D.
the same.
Question #4
_________ are substances composed of two or more different atoms bonded together. chemically.
A.
Compounds
B.
Elements
C.
Isotopes
D.
Ions
Question #5
Which of the following types of bonds can be dissociated by water?
A.
ionic bonds
B.
polar covalent bonds
C.
hydrogen bonds
D.
nonpolar covalent bonds
Question #6
Anything that occupies space and has mass is called:
A.
a compound
B.
matter
C.
an element
D.
a solid
Question #7
A pure substance that is composed of a unique atomic arrangement is called an:
A.
matter
B.
a solid
C.
a compound
D.
an element
Question #8
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.
polar covalent bond
B.
non-polar covalent bond
C.
hydrogen bond
D.
ionic bond
Question #9
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 acidic
C.
up and the solution becomes more basic
D.
down and the solution becomes more acidic
Question #10
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, 12, 4, 1
B.
2, 4, 4, 8 ,1
C.
2, 8, 8, 1
D.
2, 8, 12, 1
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