CHEMISTRY: Happy Leap Day! Here’s the lecture on the first periodic trends – atomic radii and ionization energy. You made some great connections today! Let’s finish second ionization energy tomorrow. 🙂
Hey, as you are studying for the test (and you are studying, aren’t you?!?), don’t forget the element videos in Vodpod collection below. To review the properties and uses of the elements for the test, it would be a really great idea for you go back and view hydrogen, potassium, mercury, copper, arsenic, phosphorus, and chlorine. And you might just learn something along the way! You can view the videos on these and all of the elements on this cool website, periodicvideos.com. Just click on the elements, it’d be a great review as you start to prepare for the test. Wait – did I say test?!?
HON CHEMISTRY: Wow! Who knew you guys had such “electric” personalities! Here’s the lecture on metallic bonding. Aren’t you glad there are no structures to draw! Make sure you can use the electron sea model to explain the properties of metals. Also be able to compare and contrast all three types of bonds.
We missed all you guys who weren’t here today! Because of the short period today, here is the change in schedule. The activity we were supposed to do today will be tomorrow (good news, you don’t have to write it up ahead of time in your lab book!), and then we’ll be back on schedule.
By the way, for those of you who’ve been absent, the 3-D Molecules Presentation is one that you can do at home, and then email to me. I’ll put it on the server for you if you aren’t here on Monday. You can find a copy of the 3-D Molecules Presentation here or under the project tab up top. There is one change on the compounds – the next to the last compound should be CH3CH2OH (the numbers are subscripts.) Holler if you have any questions!
HON CHEMISTRY: Hey guys, here’s the lecture from Tuesday on ionic bonding. Wow, we missed a whole bunch of you. Hope you get well soon, I don’t like having class without you!
Back to ionic bonds – keep in mind that when you write ionic bonding, you’re not trying to arrange a single structure like you do with Lewis structures. Instead, you’re writing an equation that shows electrons being lost by one atom and gained by another atom. And make sure you put the dots in the right order!
Also important, pay close attention to the comparisons of ionic and covalent bonds – and WHY! And whatever you do, stay away from bubble baths if you have mortal enemies!
CHEMISTRY: Wow! There’s a ton of interesting and important stuff to know about the elements! To make things a bit easier for you, I’ve consolidated the notes on each block into three separate vodcasts. Don’t forget to pay close attention to properties (physical & chemical), occurrence, and uses.
As you are studying, make sure you go back and practice figuring out the period, block, group, and type of element from the electron configuration. And don’t forget the topics I asked you to research for yourself: the nitrogen cycle, the role of transition metals in gemstones (know colors and elements), the role of transition metals in alloys (know names, elements and uses), where the phrase “mad as a hatter” comes from, and the symptoms of mercury poisoning and why you should be careful if you eat a lot of fish. Check out the Chapter 5 Stuff to Know sheet for more.
If you want to see some really interesting videos on some of the more “explosive” elements, check out this link – http://periodicvideos.com/
d & f-Block elements
PHYSICS: So were you surprised about the effect of change in surface area on the velocity of water, and especially the pressure of water, flowing through a tube? Thaaaaat explains how a calm ride on a lazy river can turn crazy in just a few seconds! Here’s the lecture from Monday on Bernoulli – Part 1. Today we concentrated on quantitative applications of Bernoulli’s Principle and a few practical applications. Tomorrow we’ll take the practical applications to an even higher level (pun intended!). That’s the part I like best. 🙂
Click here for a copy of the Bernoulli Worksheet if you didn’t get a copy in class today.
flickr photo by Pink Sherbet Photography
HON CHEMISTRY – Who knew we’d be doing geometry in chemistry?!? Here’s the lecture on molecular geometry, with a little practice at the beginning on polyatomic ions and resonance. Molecular geometry is super easy. Make sure you know how to draw Lewis structures, then determine the type of ABE structure and you’ve got it. Easy-peazy!
flickr photo by Ron Layters
HON CHEMISTRY: Hey guys, great job with Lewis structures, multiple bonds, resonance, and polyatomic ions today. Wow, that was a lot! Here’s some good advice – don’t take shortcuts. Learn the proper steps on the easier molecules, and you’ll be able to do the hard ones. And if it’s still all Greek to you, don’t worry! Keep practicing and you’ll get it, I promise!! Don’t forget to count electrons and don’t forget CONS!
PHYSICS: Did you realize that fluids could produce that much force? Make’s you wonder at the awesome way God designed those beautiful under water sea creatures to withstand so much pressure, doesn’t it? This little creature is a lionfish from the waters of Lembeh, Indonesia. Oh, and here’s the lecture from Monday on Pascal’s law and hydraulics and the like.
flickr photo by CW Ye
HON CHEMISTRY – I just love dots! Here’s the lecture on drawing Lewis structures. Practice, practice, practice. You can do it! Warning: before you know it, you’ll be seeing dots everywhere!
flickr photo by Spotted drum ♥ (on & off)
Chemistry in poetry – who’d of thought of such a thing? Any questions? Don’t forget to print out the Periodic Table of Poetry Mini Project requirements – you can find it posted in the project section under the tab at the top or on Edline. And then, you sign up here by posting a comment with your element. The person who signs up first gets that element. Only one person per element for all the classes! Christian Wilburn is first with carbon!
Here are a few samples I found at wordchurchscience.edublogs.org These are just for fun, though!! They below don’t follow the guidelines you have to follow from your project sheet!
first up is beryllium
there once was a prince called william
who made a car out of beryllium
the car broke down
and knocked off his crown
and now he makes them out of aluminium
second is lithium
lithium sweet lithium
will kill me if i eat it
lithium sweet lithium
will melt when we heat it
lithium sweet lithium
can power all our stuff
lithium sweet lithium
can feel very rough
jump for joy and run around ther’s stuff that could be done
when you’re playing with lithium you’re bound to have some fun
and lastly for now, helium
it’ll make your voice go high
and balloons fly in the sky
it’s a noble gas
with a very small mass
with a full first shell
its really cool as well