PHYSICS: So, how is the balance in your life? Here’s the lecture from Friday on net force, equilibrium, and equilibrants. Were you experiencing a little déjà vu?
Great job today! Thank you, J. T. and Joey, for being such good sports!!!
Image source phoenix.fanster.com/…/2009/08/tug-o-war1.jpg
CHEMISTRY – Yeah, don’t you wish it was as easy as this rule? The rules for writing chemical formulas, I mean. But no, it seems like there are about 50 million, and you have to keep them all straight! What is the one thing that would help you the most with this? Memorizing polyatomic ions? Memorizing rules for naming? More practice?
Here’s my best advice – first, memorize what you are supposed to memorize – polyatomic ions, rules, etc. Next, organize your notes into what you do for ionic compounds, those with metals and polyatomic ions, and what you do for molecules, those with only nonmetals and metalloids. Next, analyze every single compound you have to name or write a formula for – is it ionic? then you only use the Stock system. Is it a molecule – then you can use the Stock system or prefixes. Do you see what I mean?
Still a little fuzzy? The first vodcast below is from today’s class – it has the correct answers for the chemical names for common substances that you need to know for the test and a little practice with chemical formulas. The vocast below that one is from the help session this morning. VERY HELPFUL if you are still having trouble!!!
Don’t just try to wing it! You’ve got the tools you need, now go use them!! (P. S. Polyatomic ion quiz Monday!!!!)
HON CHEMISTRY: So….you think if his work helped us understand something as significant as the number of something in a mole they might name something after him? They did! Go figure! Another name for the number of anything in a mole is Avogadro’s Number. That would be how many?
You caught on super fast today! Remember, it’s all in terms of one mole. The mass of one mole, the molar mass, is the average atomic mass of the element in grams (periodic table). And the number of atoms in one mole is …. well you know that. Speaking of moles, isn’t he cute? Well, beauty being in the eye of the beholder and all. Hmmmm………
Oh yes – we’re having a help session on writing and naming chemical formulas tomorrow – Friday, tomorrow – 7:15ish A.M., and you’re invited!
CHEMISTRY: Do you feel like you have letter and numbers swimming in your eyes? This is one of those times that paying attention to details is super, super important! Here’s the lecture from today on writing formulas and names for binary molecular compounds. Part of it’s really similar to what you learned to do last week for ionic compounds, but another part is totally different. Details!!
Make sure you keep everything straight. Do something that will organize all the information for you, so you won’t get confused. Also, don’t forget the lists you have to memorize, especially the one for MONDAY – polyatomic ions!! And practice, practice, practice!!!
IMPORTANT: YES! You still re-do this questions, even though we did them in classs today! #21, 23, 41 from the end of the chapter.
Help Session tomorrow morning, 7:15ish A.M.!
CHEMISTRY: Great job today! Do you understand better now? Remember – baby steps, first binary ionic compounds, and now, formulas with polyatomic ions. Begin learning them now! And practice, practice, practice!!
Another great idea, click here for a copy of the Hints for Naming Chemical Formulas Flow Chart. Follow it every time you name chemical formulas!!
HON CHEMISTRY: So how are the chemical formulas coming? Here are a few guidelines to help polish up what you already know!
Help Session? And don’t forget to add one more thing to your “make sure you memorize for the test” list: polyatomic ions, chemical names and formulas for common substances, binary acids, oxyacids, prefixes, and from today oxidation rules. Oxidation rules! We’ve really already been using oxidation numbers, you just didn’t know it!
But does it all matter? These complicated rules about naming compounds, I mean. Let’s find out in a few days in lab!
PHYSICS: So what’s your theory about the cause of motion? And remind me again why didn’t that pen go flying across the room instead of dropping into the bottle? I love Newton’s first law – the law of inertia! Where else do you see it in action in your world?
Let’s play with this concept tomorrow. Can you use what you know about mass and inertia to find the mass of an unknown object? I know you can!
HON CHEMISTRY: Okay, I’m not saying that learning to name and write chemical formulas is as bad as a jellyfish sting (you’ll get that in a minute!), but you do have to really, really pay attention to the details!! Here’s our discussion on writing formulas and names for binary molecular compounds. Part of it’s really similar to what you learned to do last week for ionic compounds, don’t you think? The other part is totally different, though!
Make sure you keep everything straight. Find a way to organize all the information for yourself so you won’t get confused. Also, don’t forget the lists you have to memorize – chemical names for common substances, polyatomic ions, acids, and numerical prefixes. And practice, practice, practice!!!
CHEMISTRY: Great job today learning to name binary ionic compounds – and even begin to write formulas! Tomorrow let crank it up a notch and write formulas for compounds with polyatomic ions. Speaking of those, what is your plan for all the memorization in this chapter? Word of warning – don’t wait to the last minute!!
Super important – the secret for the next few days is DON’T GET BEHIND! Keep up with me and practice, practice, practice!
HON CHEMISTRY: Are you starting to see numbers in your sleep? Here’s the lecture from Friday on writing chemical formulas with polyatomic ions. The same………but different? Tons of memorization for this chapter – monatomic ions, polyatomic ions, and this is just the beginning!
flickr photo by designwallah