Name _____________________________________ Period ____
How atoms bond
http://ed.ted.com/lessons/how-atoms-bond-george-zaidan-and-charles-morton
1. Choose a molecule from the video, and write a complete and correct Lewis structure for
it. What information (about protons, neutrons, and electrons) gets transferred from the
full view we show in the video to the Lewis structure? Why do you think Lewis
structures are a useful tool for chemists?
2. Explain how human chromosome 13 can be composed of just two molecules but have so
many atoms. What are those two molecules? How are they bonded to each other?
3. Draw a molecule of hydrogen gas (H2). Using what you know about positive and
negative charges, sketch all the forces between all the particles in this system. Does it
seem reasonable to you that the hydrogen gas molecule should exist and be relatively
stable, based on your sketch? Does your sketch raise any new questions about the nature
of covalent bonding?
4. In an ionic bond, ________.
a. Two electrons are shared between two atoms
b. An electron is shared between two atoms
c. An electron is transferred from one atom to another
d. A proton is transferred from one atom to another
5. In a covalent bond, ________.
a. Two electrons are shared between two atoms
b. An electron is shared between two atoms
c. An electron is transferred from one atom to another
d. A proton is transferred from one atom to another
6. Sodium chloride is a lattice structure, in which ________.
a. Every chloride ion is surrounded by 4 sodium ions
b. Every chloride ion is surrounded by 6 sodium ions
c. Every chloride ion is surrounded by 8 sodium ions
d. Every chloride ion is surrounded by 6 electrons
7. Most biological molecules, like DNA or proteins, are held together mostly by ________.
a. Ionic bonds
b. Covalent bonds
c. The weak nuclear force
d. Magic
8. The number of other atoms an atom can bond with (covalently) depends on ________.
a. How its outermost electrons are arranged
b. How its innermost electrons are arranged
c. How many protons and neutrons are in its nucleus
d. Whether the sample is pure or not