Electron Configuration

Electron configurations is determined by the sublevel energies and the element. An electron configuration is a short hand for showing where certain electrons are located on a certain atom of an element. Electron configuration is the assignment of quantum numbers to each electron in an atom of a given element. Electron configuration shows the number of electrons (which is the exponent or superscript after the letter) in each sublevel. For instance the book gives the example:

1s²2s²2p⁵

^{Which means that there are two electrons in the sublevel 1s and 2 in the sublevel 2s and 5 electrons in the sublevel 2p. This means that this particular element has 9 electrons which means it is Fluorine.}

When it is written as 1s² this refers to the electron being in the region of N = 1.Which means that the only "l" option that is possible is 0 (thats zero not "O" like in oh no!) or "s". Because l is 0 there are only two electrons that can be there, and since the 1s sublevel is full (which it must be to begin filling up the next sublevel) the superscript says two (meaning two electrons). If we continued writing a substance's Electron configuration we could go on for a long time but since this has only 9 electrons it would stop at 2p. Each letter ("s", "p", "d", "f") has a top level of electrons of which more than such it cannot hold. for instance, "s" can only hold 2 electrons maximum, "p" can only hold 6 electrons maximum, "d" can only hold 10 electrons maximum, and "f" can only hold 14 electrons maximum.

So for example when all are full it would look like this:

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴

^{Which has 60 electrons so this indicates that it would be the element Neodymium.}

^{Electron Configuration is a simple way of writing out the electrons positioning of an element, which is important to know for doing other things, and can tell us a lot about an element.}

^{soooo... yeah. thats Electron configuration,} Electron configuration, Electron configuration, Electron configuration which makes the tenth time I've said Electron configuration... 11 actually. So thats about it we will learn more on monday, i think, i dont actualy plan the lessons but whatever, the next scribe will be: Joshua D-D-D-EIN!!! (said in monster truck rally voice)

thankyou, and farewell, i will see y'all Monday.

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.