1. Water is molecule held together by __polar covalent____ bonds and
interacts with neighboring water molecules through ___hydrogen___ bonds.
2. What constitutes a polar bond? What are some examples of molecules with
polar bonds?
A polar bond is a bond where there is an uneven sharing of electrons causing
a one sidedness to the bond. For instance in water there is a partial negative
charge on the oxygen and partial positive charge on the hyrdrogen atoms.
3. What constitutes a ionic bond and what are some examples of molecules
containing ionic bonds?
An ionic bond is formed when a atom creates a bond with another molecule
by completely taking another atoms electron which is seen in NaCl.
4. What is the PH scale and what does it really measure?
The PH scale is a logarithmic scale that measures the concentration of hydrogen
ions in different solutions.
5. What is the PH of a solution if the POH of the solution is 12? Would that solution be
considered acidic or basic?
PH=2 an acidic solution
CHAPTER 2 ACTIVITY: ATOMS AND BONDS (Key)
(recall and comprehension)
Test your knowledge. Match the statements with the best answer below. Answers can
be used more than once.
A. IONIC BOND
F.
NUMBER OF PROTONS
B. SINGLE COVALENT BOND
G. OUTER ELECTRON SHELL
C. DOUBLE COVALENT BOND
H. WATER
D. POLAR COVALENT BOND
I.
ELECTRON
E.
NITROGEN
J.
NONPOLAR COVALENT BOND
1.
C. DOUBLE COVALENT BOND:
formed by the sharing of two pairs of electrons
2.
F. NUMBER OF PROTONS____
determines the atomic number of an element
3.
D. POLAR COVALENT BOND
formed when atoms share a pair of electrons from their
outer shells, but the electrons are not shared equally
4.
H. WATER
an example of a molecule with a polar covalent bond
5.
E. NITROGEN
has an equal number of protons and electrons
6.
J. NONPOLAR COVALENT BOND type of bond found in a molecule that cannot dissolve
in water
7.
J. NONPOLAR COVALENT BOND formed when two atoms share pairs of electrons from
their outer shells, and the electrons are shared equally
8.
G. OUTER ELECTRON SHELL
location of electrons that determine how an atom will
form a chemical bond
9.
B.SINGLE COVALENT BOND
bond formed when two atoms share one pair of
electrons from their outer shells
10.
I. ELECTRON negatively charged particles of an atom
11.
D. POLAR COVALENT BOND type of bond found in a water molecule
12.
D. POLAR COVALENT BOND type of bond commonly found in water soluble
organic molecules