Metals and Nonmetals

Today in class we worked in the Red Book to figure out the differences between metals and nonmetals.


Homework: Read pg 295-296 in the Blue Book. Make a T chart showing 4-5 properties of metals and 4-5 properties of non-metals.
Metals Non-metals

Tuesday/Wednesday

Students learned how to predict and then build models of common molecules such as carbon dioxide, methane, ethane



Homework: None

Monday

We started our molecular models using marshmallows and pasta bonds.

Homework: What is the difference between molecules and compounds? (2-3 sentences)

Teachers in Training

Today students played teacher and taught each other about ionic and covalent bonds. We also learned more about why certain elements bond better with each other= valence electrons! The valence electrons of atoms that bond should add up to 8. Here is a chart showing how elements in the same column have the same number of valence electrons, or electrons on the very edge of the atom that are involved in chemical bonds:
For Example: Lithium (1 valence e-) bonds with Fluorine (7 valence e-) because they add up to 8 to make the bond noble.

Homework: None

Ionic Vs. Covalent Bonding

Today in class you watched an animation of how ionic bonds occur and how covalent bonds occur. Here is a link to that animation and a link to the differences between the two types of bonds.

Bonding Animation

Ionic vs. Covalent Bonding

Homework: In class you were assigned covalent or ionic bonds. Your assignment is to prepare a presentation (3-4 min) with at least 1 visual (picture, drawing, pic from internet) about your assigned type of bond to share with your partner. It is your responsibility to come prepared to teach your partner, do not let them down!

Compounds!

Pick compounds from these links to write the chemical formulas.

You can also use Google to search for common substances that are not found on these websites.

Compounds List

Medicines

Example: Compound: Salt Chemical Formula: NaCl Recipe: 1 Sodium and 1 Chlorine

Homework: Find the definition of a mixture in your book. How is a mixture different than a compound? (3-4 sentences)

Persuasive Essay

Today we worked on our persuasive essay answering the question:  What is your opinion on using science and technology in war?  

Outline:

Paragraph 1:  Introduction-Take a stance and briefly list three reasons to support your opinion.

Paragraph 2:  Reason 1 with three details to support it

Paragraph 3:  Reason 2 with three details to support it

Paragraph 4:  Reason 3 with three details to support it

Paragraph 5:  Counter-argument: include what the other side would say about technology and science in war, but then refute it with evidence from your own stance.

Paragraph 6:  Conclusion

Homework:  Bolded paragraphs above:  Introduction paragraph and Reason 1 paragraph for persuasive essay-written or typed

Technology of war

After an atomic bomb presentation, students will write a persuasive essay that either defends the use of technology and science in war, or goes against the use of these technologies during war.

Websites for further research:
How Stuff Works: Technology of War
Atomic Archive.com

Remember a persuasive essay needs the following:
1. Three developed reasons with 3 details of why you are for or against technology and science in war.
2. A counterargument- What would the other side say?
3. A clear introduction and conclusion
4. Watch for grammar and spelling

Homework: brainstorm ideas for persuasive essay

Isotopes and Ions Continued plus the Atomic Bomb

What is an isotope? It is an atom that has the correct number of protons, but the number of neutrons has changed. Carbon-14 is an example of an isotope that has 2 extra neutrons in its nucleus. Carbon-14 is used to determine how long ago different dead organisms existed.

What is an ion? It is an atom that has lost or gained electrons. Ions are charged atoms. Why don't neutrons affect the charge of an atom? Think about the charge that a neutron has.



Homework: None

Atom Identity, Ions, and Isotopes

Today in class we started working on the Element Builder simulation on www.explorelearning.com.

Homework: Pg. 205 Do #1-5