Thursday, April 9, 2020

Week of 4-9-20

NOTE: ONLY USE THIS IF YOU CAN'T ACCESS GOOGLE CLASSROOM

9th Grade

·  Week 2:  Dot Structures and Determining Bond Types

QUICK REVIEW: Last week, you reviewed the number of protons, neutrons and electrons in an atom. Today we are focusing on the ELECTRONS

FIRST: Remember valence electrons are the electrons in the OUTERMOST level. These are the ones that participate in bonding, that is why we care about them. 
  • RECALL: We look at the periodic table and the GROUP/FAMILY number tells us the amount of valence electrons, Group 1 has 1, Group 2 has 2, Group 13 has 3, Group 14 has 4.... Group 18 has 8.

You all remember, these are dot diagrams: 

 


SECOND: Now I need you to remember how we determine bond type using electronegativity (EN) values. 


Remember EN values tell us how much an atom is pulling/ taking the electrons…. F (values of 4) has a very strong pull, whereas Li (values of 1) does not have much of a pull or hold at all.
To determine the bond type between two atoms, we subtract the two EN values and use this table to figure out the bond “character” or the type of bond.


If we were looking at Li and F, 4-1= 3. So they would form an ionic bond with Li+ and F-

Remember, COVALENT bonds are sharing the electrons between the atoms. 
-Nonpolar Covalent is EQUAL sharing
- Polar Covalent is UNEQUAL sharing and we need to show PARTIAL CHARGES







ACTIVITY ON NEXT PAGE, SCROLL DOWN


















ACTIVITY: 

Part 1.  For the following elements, create dot diagrams. Remember how we used fruit loops?? See how creative you can be and find something around your house to represent valence electrons and create dot diagrams, take pictures and attach. 

-If you can’t take pictures, describe WHAT you used and HOW MANY valence electrons you needed to add.

  1. K
  2. Mg
  3. Br
  4. Na
  5. Si
  6. Kr
  7. N


Part 2.  For the following element combinations, CALCULATE using the EN values and determine the bond type.

Example: Hydrogen and Oxygen….
3.5-2.1= 1.4, this is POLAR COVALENT with partial negative on O and partial positive on H

  1. Nitrogen and Oxygen
  2. Lithium and Beryllium
  3. Potassium and Bromine
  4. Silicon and Silicon
  5. Sulfur and Carbon




8th Grade

Week 2 Article 


Hi guys! Last week's assignment was a way to work out all the bugs. NEW DIRECTIONS FOR THIS WEEK! READ ON...

You are getting a new article this week. I attached a LINK.


https://newsela.com/read/human-connection-immune-system/id/2001007493

WHEN YOU ARE DONE READING create a document OR post in the private comments the answers to these questions:

1. Your answers to the multiple choice questions that are at the end of the article
2. One question you have about the article
3. One opinion or thought you have about the article

Tuesday, March 31, 2020

Week of 3-30-20

NOTE: ONLY USE THIS IF YOU CAN'T ACCESS GOOGLE CLASSROOM

9th Grade

·   Week 1: Element Scavenger Hunt

QUICK REVIEW: Think back to the beginning of the year when we learned that an atom is the basic unit of an element.

Atoms consist of protons, neutrons, and electrons, with the amount of each of these subatomic particles varying for each element.

The periodic table tells us the number of each:
         Atomic number= # protons = # electrons
         Mass number= # protons + # neutrons

ACTIVITY: Go around your house and find 10 different elements in different items. Document your finds by taking pictures. Some might be obvious, like “a banana contains potassium” and “water contains oxygen and hydrogen,” but for others you might need to do a little research.

For each element, complete the following:

1.      - Element:
- Symbol:
-Item it was found in (take picture if possible):
-Atomic number:
-Mass number (round average atomic mass from periodic table to a whole number, for instance oxygen would be 15.9999 rounded to 16):
-Number of protons:
-Number of electrons:
- Number of neutrons:

SHARE your findings with someone at home (yes your dog counts) or post on here! I would love to see some of your creative finds in your home!





8th Grade

Week 1 Article 

-Click the attachment and sign in with your school google login.
-Read the attached article.
-When you are done reading, complete the quiz at the end of the reading.


https://newsela-media.s3.amazonaws.com/pdfs/lib-vaccine-for-new-coronavirus-2001006296-article_quiz_and_answers.pdf?AWSAccessKeyId=AKIAIOXSRXVQ3RGAX2FA&Signature=tJQf5yf36rCG97tlyRYM49A9M7k%3D&Expires=1585503645

Tuesday, March 24, 2020

Week of 3-23-20

9th Grade

Last time we met we started our Water Lab. You began exploring the properties that water has, due to its polarity. 

While you are at home, find other ways that you can observe surface tension, adhesion, and cohesion in your every day experiences.



8th Grade

Last time we met we were going over the rock cycle and identifying rocks. Go outside (if possible) and see what kind of rocks you can find! What characteristics do the have? What category do they belong in? Why?

Friday, March 6, 2020

Week of 3-9-20

9th Grade

Monday-  Chapter 7 Review
Lab Packet and Book work DUE TODAY

Tuesday-  Go Over Review, Test Tomorrow

Wednesday- IONIC COMPOUNDS TEST

Thursday-  Begin Covalent Compounds

Friday- Molecules Intro Project


8th Grade
This week we will review Humans and the Environment and The Rock Cycle

Friday, February 28, 2020

Week of 3-2-20

9th Grade

Monday-  Complete Polyatomic Hunt

Tuesday-  Ionic vs. Covalent Compounds

Wednesday- Start Lab: Ionic Compound Properties

Thursday-  Lab Continued

Friday-  Complete Lab and Conclusions


8th Grade

This week we will review Biomes and Humans and the Environment

Friday, February 21, 2020

Week of 2-24-20

9th Grade

Monday-  Polyatomic Ion Intro

Tuesday-  Polyatomic Ion Practice

Wednesday- Polyatomic Scavenger Hunt Begins

Thursday-  Polyatomic Scavenger Hunt Continued

Friday-  Quiz Polyatomic Ions


8th Grade

Review Water Cycle this week! 

Friday, February 14, 2020

Week of 2-17-20

9th Grade

Monday- No School! 

Tuesday-  Begin Ionic Compounds... dot diagram review

Wednesday- Forming ionic compound practice 

Thursday-  Naming Ionic Compounds

Friday-  Ionic Compound Match Game


8th Grade

Continuing Cloud Card Sorts this week