This was me on my way to school today

I’ve been feeling ill all week, and it has finally gotten the best of me… so I’ll be taking the day off to hopefully get well soon. Below is a description of what you’ll be working on on Friday in my absence. Please Email me if you have questions.

Test Corrections:

Get your graded scantron and test. For each incorrect answer, if you explain what the correct answer is AND why, you will earn 1 point of the 2 pts missed back. So if you missed 5 questions, you can earn 5 pts. The responses should be as detailed as possible and in complete sentences to get credit. Please do this in pages or Notability on the iPad and email me the finished product as a doc or PDF and I will be able to grade it while recouping at home.

Note: You DO NOT have to correct #’s 16, 17, 34, & 37. Those points have been given back to you on powerschool.

Unit 8 Test Tomorrow!

Below are some links to review games and activities you can use to help you test your knowledge of Periodic trends and Electron Configuration.

Review Game- Periodic Trends

Review Game- Electron Configuration

Quizlet

Online Quiz

Quiz

The news is that our Unit 8 Test is scheduled for this Thursday April 11th. You’ll be given a pre-test, based on the real test today. Also this week, we’ll be heading to the lab to do our “Flame Test”. The date we’re in the lab is yet to be determined… but it won’t be Wednesday or Thursday… obviously. The Pre-Test is posted on the Sem2 Docs page and the key will be up later today. Good Luck!

Let’s all pray that this trend does not catch on…

Not the fashion trends, or your hashtag trends…

We’re talking about Periodic Trends, or trends that occur on the Period Table. Their are a few of these trends we are going to follow. The first one is based on Atomic Radii. We’ll be graphing data based on atomic numbers and atomic radii of elements to see if there is a trend and then answer questions based on that data. The PDF can be downloaded from the link below. You will need to download two Apps if you are using the iPad. If not, you will need a periodic table with data on Atomic Radii and graph paper. #GoodLuck (← that’s trending… get it!?)

Periodic Trends: Atomic Radius

We’re gonna take it nice and easy this first day back with a quick review of Electron Configurations and Orbital Diagrams that we left off with before we went on a week and a half hiatus. But! You can plan on having a quiz over these topics (and KLM diagrams) on Thursday.

To complete today’s assignment (the answers are posted BTW), you’ll need the following information about Orbital Diagrams. These are the rules that dictate where electrons go and how they spin.

1. Hund’s Rule: One electron is placed in each orbital of an electron shell BEFORE a second one is put in any of the shells.

• Correct: ↑↓  ↑_   ↑_  ↑_  ↑_
• Incorrect: ↑↓  ↑↓  ↑↓  __  __

2. Aufbau Principle: Each shell must be completely filled before beginning to fill the next shell

• Correct: ↑↓      ↑_   ↑_  ↑_
•              3s        3p
• Incorrect: __    ↑↓  ↑↓  ↑_
•                3s          3p

3. Pauli Exclusion Principle: Electrons in the same orbital spin in opposite directions

• Correct: ↑↓
• Incorrect: ↑↑

Hello Springtime!

See you tomorrow!

Now that I have mastered the art of screen capture and YouTube, I’ve created a channel that I will post (hopefully) all of our future lecture’s rather than using Voicethread. This should make the material more accessable and the information more palatable!

Please subscribe using the link below!

MrKubuske YouTube

There are three important pieces of information you will need to complete the Electron Configuration Worksheet from yesterday’s lesson.

1. Tricks

Lets do the Electron Configuration for ₅₇Ce. It would look like this:

Because ‘La‘ comes before ‘Ce‘, we have to add the 5d¹ before we start counting the 4f orbital.

Now if we did the Electron Configuration for ₇₂Hf, which is next to La, we have to go entirely through the 4f orbital before we go back to the 5d.

BUT! When we do this, it would not make any sense to write 5d¹ 4f¹⁴ 5d²…

SO… we combine the 5d’s and place them after the 4f

2. Ions

Simple… if it’s a (-) then you add electrons to the final orbital.

₉F is 1s² 2s² 2p⁵
₉F^-1 is 1s² 2s² 2p⁶

If its a (+) then you subtract electrons from the final orbital(s).

Na is 1s² 2s² 2p⁶ 3s¹
Na⁺ is 1s² 2s² 2p⁶           The 3s orbital has been lost!

3. Shorthand

This is the shortcut so you do not have to write out those huge-mungous (yes that is a word) electron configurations.
Lets do the electron configuration for Cl.

₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵
The shorthand version uses the MOST RECENTLY PASSED NOBEL GAS (so when you pass gas use the shortcut… get it… c’mon that’s funny!) So for Cl, the most recently passed gas is Ne. So instead of starting at our ‘House’ (H), we’ll start at Ne and then count the orbitals from there.
₁₇Cl [Ne] 3s² 3p⁵

If you cannot view the video (i.e. you’re on an iPad), click the link below.

Electron Configuration YouTube