10.4.2011 MEASUREMENT

Announcements:

• we had a quiz today (Ionic Bonding)
• we have a quiz tomorrow
• 5pts each
• Did worksheets

Homework:

• Naming Ionic Compounds Summary - 1 (or page 15)

Body:

The first worksheet we did in class was Naming Ionic Compounds 2(page 11). This was basically just looking for the abbreviations and the elements name. After that we did page 12, Polyatomic Ions 1. Poly means many, atom means atom (duhh), and -ic means together, SOO many atoms together! These are confusing and this video should help explain and make it simpler. http://www.youtube.com/watch?v=gmcLYWtjXgQ

I think it'd be a good idea to memorize these. there is only 7 of them. Yes there are 8 on the sheet but we didnt do bicarbonate. These are the symbols for the polyatomic ions.

• sulfate SO4 charge= -2
• nitrate NO3 charge= -
• phosphate PO4 charge= -3
• hydroxide OH charge= -
• carbonate CO3 charge= -2
• ammonium NH4 charge= +3
• acetate CH3COO charge= -

CATion and ANion are positive and negative. Think of cat as in t looks kind of like a + sign and an.......well doesn't. Parentheses are used sometimes when a molecule, as opposed to an element is present more than once. Transition metals 1 (pg 13), we did 1, 4, 6 and 7. Number seven asks about when we put roman numerals in the name of a n ionic compound. We only use them when using transition metals and only when writing words out.

ROMAN NUMERALS

ok im on youtube looking for a video that explains roman numerals, and that autocomplete thing shows me roman numerals song. so i click on it and i found a riddle. so i thought id share.

http://www.youtube.com/watch?v=KQkKzqN0Hjc

this next one actually explains roman numerals

http://www.youtube.com/watch?v=QrbHF7upzp8

Next we did page 14 or Transition Metals 2

Transition metals are the ones that are covered up when we fold our periodic tables. From these worksheets i think its a good idea to actually memorize the periodic table bc its just annoying to have to search for every element or symbol you see.

POLYATOMIC IONS ARE ALSO ON THEE PERIODIC TABLE :D

dont forget the homework is page 15, Naming Ionic Compounds Summary 1

The next scribe is Jameson B. because he hasn't gone yet. muahaha :P