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!!!!)
CHEMISTRY 10-24-14 Chemical Names for Common Substances from Tammy Skinner on Vimeo.
CHEMISTRY 10-24-14 Chemical Formulas Help Session from Tammy Skinner on Vimeo.
I really enjoyed how you walked us though how to name the chemical formulas and write them out.
Thanks for posting the help session from this morning! It really helped!
The help session from this morning really helped me to be able to write and understand chemical formulas.
thanks for posting the help session from this morning. it really helped me review!
The extra practice most definitely helped. I feel much more prepared now.
When writing formulas do you have to simplify the formula?
The sheet today really helped me learn the poly atomic ions.
Thank you for posting the help session from this morning. I know that it will help me.
The help session is going to help me a lot with understanding how chemical formulas are wiritten.
Thanks so much Mrs. Skinner this practice really helped! I’m Having a lot of fun learning about polyatomic ions.
This week I learned how to properly write chemical formulas.
I really enjoy using the prefix method of naming, and I’m finally starting to get the hang of the transition metals deal!
We only place parenthesis around polyatomic ions when there are more than one.