11/2/11
Post date: Nov 01, 2011 7:54:38 PM
Bell Ringer (on board): Draw the model and write the formula for the compound formed with Hydrogen and Carbon combine.
Naming covalent compounds notes
Hydrogen and Carbon (and many other combinations of elements) can covalently bond in multiple ways
Because of this, the name needs to give us more information than just which elements were involved
Covalent names include number prefixes, which we use to tell how many atoms of each element are in a molecule (e.g. H2S is Dihydrogen monosulfide, where "di" and "mono" are number prefixes meaning 2 and 1, respectively)
Number prefixes:
Example: H20
Name will include hydrogen and oxide, but these need to have number prefixes
Prefix for 2 is Di, for 1 is Mono
This compound (water) is also named Dihydrogen monoxide
There is currently a hoax going on of convincing people we need to ban Dihydrogen monoxide (water!)
The only time we DO NOT use a prefix is if the first element named would have "mono" as the prefix. In that case, leave the prefix off.
Example: OF2 is Oxygen difluoride, NOT Monoxygen difluoride.
Assignment: Drawing, naming, and writing formulas for covalent compounds worksheet