Naming Compounds

Hello. Today in class we learned about naming compounds. We were given two worksheets in class. We started out class by working on the worksheets with a partner and then we later discussed them in class.

The worksheets were about naming and writing ionic compounds.
Here are some patterns that take place in ionic compounds:

• All compounds are made up of a nonmetal and metal.
• The 1st element listed in the compound is the metal. It always ends in "um" (ex: sodium chrloride)
• The 2nd element listed in the compound is the nonmetal. It always ends in "ide" (ex: calcium chloride)
• Compounds always have a neutral charge.
• The 1st element listed is also always a positive ion.
• The 2nd element listed is always a negative ion.

If you follow these rules, you will easily be able to write or identify compounds.

The rules change a little bit if the compound involves a transition metal.

Here is how the rules change:

• The 1st element listed is still the metal but it no longer ends in "um" (ex: iron (II) chloride)
• Roman numerals are placed after the transition metal. The roman numerals indicate what the charge of the transition metal must be in order to make the charge of the compound neutral. (ex: iron (II) chloride. Since the charge of chloride is -2, iron must have a charge of +2 in order to make the compound neutral.)

The rest of the rules stay the same for transition metals. You can tell the the compound involves a transition metal if there are roman numerals written in the name.

That is basically all we learned in class today. If you need more help, I would suggest reviewing the notes or rereading the book. The homework for monday is to finish the worksheets and do the chemthink about ions. There is also a test on thursday.

The next scribe is Lauren C.!