1. Atoms, Bonding, and Water Questions
Answer all parts of each question with red text. E-mail the completed assignment to as a Google
Document to
mrobbins@pennsvalley.org
You may use my lecture slides, periodic table and your text book. You may get help from one or two
classmates that are sitting next to you, but you may not move to select your partner.
If you get help from partner(s) for this assignment you must pay attention to these rules:
1) If asked for help, you should try to explain how to solve the problem or indicate where they can
find the answer.
2) But you should not just give away answers as this will be considered cheating on homework
and will affect your participation grade.
3) If you do not finish, I am available to help you during RAM time.
1 point awarded per correct answer
Questions
DAY 1
1. Explain why water is not an atom. Answer Here
2. Water is a type of what? Answer Here
3. How can an egg serve as a model for an atom? In your answer, use the vocabulary, proton,
neutron, and valence electron. Answer Here
4. What charges do protons, neutrons, and electrons have? Answer Here
5. How many protons does phosphorus have and where did you find this number? Answer Here
6. How many electrons does phosphorous have? Answer Here
7. How many valence electrons does phosphorous have? Answer Here
8. How many valence electrons does it take to complete the electron shell that is closest to an
atoms center? Answer Here
9. How many valence electrons does it take to complete the electron shell that is second closest to
an atoms center? Answer Here
10. How many valence electrons does it take to complete the electron shell that is third closest to
an atoms center? Answer Here
11. How can an octopus (or octopi) serve as a model for the octet rule? Describe the octet rule in
your answer. Answer Here
12. How many chlorine atoms are in Sodium Chloride? Answer Here
13. Describe the kind of bond is in sodium chloride and use the words valence and electrons in your
answer. Answer Here

2. 14. How many chlorine atoms are in Magnesium Chloride? State how did you used the octet rule
to solve this problem? Answer Here
15. Magnesium has a 2+ charge and two valence electrons. The two valence elections each have a
negative charge, so why do we say Magnesium has a positive 2 charge?
DAY 2
16. What is CHNOPS and why are they important? Answer Here
17. Name and describe the one type of bond is responsible for holding molecules of hydrogen gas
(H2), carbon dioxide (CO2) and water (H2O) together. Use the words valence and electrons in
your answer. Answer Here
18. What makes water a polar molecule? Use the words: electrons, hydrogen, oxygen and atoms in
your answer. Answer Here
19. What does it mean for a molecule to be nonpolar? Answer Here
20. What is special about carbon that allows it to be in so many of the molecules in our body? In
your answer use the word bonds. Answer Here
21. Our bodies have many compounds that contain carbon. What 3 common shapes do these
compounds have? Answer Here
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
DAY 3 Questions
Water is a bent molecule. If instead, the water molecule was shaped like a line (H-O-H), how
might this affect its polar nature? Use the word electrons in your answer. Answer Here
Give an example of capillary action. Answer Here
What is the term that describes how water molecules can stick to other water molecules?
Answer Here
What is the term that describes how water molecules can stick to other molecules that are not
water? Answer Here
Capillary action is caused by hydrogen bonds. If each hydrogen bond is weak, how come water
can climb a narrow tube? Include the word “many” in your answer. Answer Here
What are the partially-positive and partially-negative parts of a water molecule? Answer Here
Use your answer to question 27 to explain why hydrogen bonding helps to facilitate cohesion.
Answer Here
Which of the following is not facilitated hydrogen bonding:
A) Cohesion
B) The linkage between hydrogens and oxygen in H2O
C) Adhesion
D) Surface Tension
E) Dissolving polar and ionic substances
Answer Here
What is your answer in #29 facilitated by? Answer Here
Tell Calvin the real reason ice floats. Answer Here

3. 32. Describe why ice forming on the top of a lake instead of the bottom of the lake is ideal for
organisms that live in the water? Use the word insulates in your answer. Answer Here
33. Water has the nickname “The Universal solvent”. Why does it have this nickname? Answer Here
34. What class of substances are water unable to dissolve? Answer Here
35. Tell me why the freezing point and the boiling point of water make it a suitable molecule to
support life. Answer Here
36. Water has a high specific heat. What does that mean in your own words? Answer Here
37. Would homeostasis have trouble keeping up if water had a low specific heat? Explain Answer
Here