Naming Compounds

We began class this fine Friday afternoon with a happy reminder that we have a BIG test covering the whole unit coming up on this Thursday, October 14. So remember to have all of your book problems and worksheets done and ready to be graded. We also have a Chemthink on Ions due this Monday.

After going over the things happening next week, we worked on the sheets, which we had picked up at the beginning of class, with our partners. The sheet was called naming compounds. On the first side of the sheet was a list of compounds, which consisted of a metal and non-metal. When you have a compound of a main metal and a non-metal you characterize it it with a two part name. The first word in the name is the metal, or the positively charged ion. And the second part would be the non-metal, or the negatively charged ion. The second part, the non-metal, always ends with the suffix "-ide." So we tried our luck at naming a few ourselves.

Some examples are:

- NaBr Which is Sodium Bromide

- CaF₂ Which is Calcium Fluoride

- Al₂S₃ Which is Aluminum Sulfide

After that we flipped the page over and did part 2, the difference now was that we were using transitional metals which can have multiple charges. So to wright the name of one of these you do the first name which is the transitional metal, or positively charged ion then you do the Roman numeral number for the charge in parentheses. Then you would wright the second part for the next element which would ,again, end in "-ide."

Some examples are:

- FeBr₃ Which is Iron (III) Bromide

- NiS Which is Nickle (II) Sulfide

- CoCl₂ Which is Cobalt (II) Chloride

After we had finished the worksheet we went back to our seats and went over some notes. These notes were from slides "Names of compounds-Cations" to "Ionic Compounds." At the end of class he told us to remember some polyatomic ions, such as:

OH- Hydroxide

NH₄⁺ Ammonium

NO₃^- Nitrate

CO₃^2- Carbonate

PO₄^3- Phosphate

SO₄^2- Sulfate

The other naming compounds worksheet we received is due thursday (the day of the test.)

Also start studying for the test and a pop-quiz we were warned about which could come on Monday or Tuesday.

Now the next scribe will be... John A.