Recap As we go through the following questions, write down the topics that you are having trouble with and then when you come in for extra help, you know what to ask!

Do you know the parts of the PT?

Do you know the families on the PT?

Do you know your element symbols and names??? It really does help! You should probably start learning some polyatomic symbols as well!

Do you know how to figure out the charges on an ion?

Do you know how to find out the symbol and charge for a polyatomic ion?

Do you know how an ionic compound is formed?

The Trick to Forming Ionic Compounds

Forming Compounds Using Polyatomic Ions

Can you Name Ionic Compounds When Given The Formula? Identify the ions in the compound Name the ions in the compound Change the ending on the second element to “ide”  Na 2 S  Sodium and Sulfur  Sodium Sulfide

Identify the ions in the compound Name the ions in the compound Change the ending on the second element to “ide”  KCl  Potassium and Chlorine  Potassium Chloride

Can you name an ionic compound with a Polyatomic Compound? Identify the ions in the compounds. Name the ions in the compound (use the polyatomic ion chart). Put the two names together  Li(NO 2 )  Lithium and Nitrite  Lithium Nitrite

Can you name a Compound That has a Transition Metal? Identify the ions in the compounds. Name the ions in the compound (remember that transition metals have to have a roman numeral in their name). Put the two names together  Ag(Cr 2 O 7 )  Silver (II) and Dichromate **Dichromate has a charge of –2 and it only take one silver to cancel that charge out, silver must be +2  Silver (II) Dichromate

Can you Write a Compound Formula When Given the Name? Identify the ions in the formula Write down the symbols and determine the charge using the valence electron trends Put the two ions together (cation goes first) Sodium Nitrate Made up of sodium ion and Nitrate ion Sodium ion is Na + Nitrate ion is NO 3 - Na + and NO 3 - form NaNO 3

Identify the ions in the formula Write down the symbols and determine the charge using the valence electron trends Put the two ions together (cation goes first)  Copper (II) Chloride made up of Copper (II) and Chloride  Copper (II) is Cu +2 Chloride is Cl -  Cu +2 and Cl -1 form CuCl 2

CAN YOU NAME OR WRITE MOLECULAR COMPOUNDS?

Covalent Molecule Prefixes Mono = 1 Di = 2 Tri = 3 Tetra = 4 Penta = 5 Hexa = 6 Hepta = 7 Octa = 8

Covalent Molecule Examples An example of a covalent molecule is P 2 O 5 This would be called Diphosphorus Pentaoxide Another Example is N 3 O 5. This would be called Trinitrogen Pentaoxide

Using “Mono” with Covalent Molecules When there is only one atom of the first element, mono is not used CO 2 is called Carbon Dioxide not Monocarbon Dioxide When there is only one atom of the second element, mono is used. N 2 O is called Dinitrogen Monoxide

CAN YOU NAME OR WRITE ACIDS?

Naming Acids and Their Ions There are two main kinds of acids: binary acids and oxoacids. A binary acid is composed of two elements: hydrogen and a non metal. The general formula for a binary acid is HX, where X is the non-metal. (HBr and HCl are two examples).

To name a binary acid Attach the prefix hydro Use the non-metal name as the root Attach the suffic “ic” Add the word acid

HF Hydrofluric acid HCl Hydrochloric acid HBr Hydrobromic acid HI Hydroiodic acid H 2 S Hydrosulfuric acid

An oxoacid (oxyacid) is an acid formed from a polyatomic ion that contains oxygen, hydrogen, and another element. For anions that end in “ate”, change the ending to “ic” and add the word acid ClO 3 - is chlorate HClO 3 - is called chloric acid

For anions that end in “ite”, change the ending to “ous” and add the word acid. ClO 2 - is chlorite HClO 2 - is chlorous acid

The prefixes hypo and per remain as part of the acid name. ClO 4 - is perchlorate HClO 4 - is perchloric acid