Do Now: What are ionic compounds and what do they consist of? Define cations and anions. How do you determine the charge of ions formed from representative elements?

Ionic Compounds Ions formed from transfer of electrons (to satisfy octet rule) Consist of cations(+) and anions(-) held together by ionic bond (electrostatic force of attraction) Typically, metals(+) and nonmetals(-) Let’s work on nomenclature, rules for naming

What is the charge and symbol for the following Cations Anions Nitride? Sulfide? Chloride? Iodide? Oxide? Magnesium? Copper (II)? Sodium? Zinc? Aluminum? Iron (III) Talk about transition metals

Formulas: Ionic Compounds are electrically neutral Write the symbol and charge for each ion Balance it! The total positive charge must equal the total negative charge. 1. Potassium chloride 2. Barium iodide 3. Aluminum oxide 4. Nickel (II) fluoride

Write formulas for Lithium oxide Iron (III) bromide Nickel (II) fluoride Aluminum sulfide Magnesium chloride Strontium phosphide

What are polyatomic ions?

Polyatomic Ions Ions that are made up of more than one atom. Examples are SO42- or OH- or NO3- Use as you would any part of a compound

Write balanced formulas for Barium nitrate Sodium permanganate Ammonium chromate Copper (II) hydroxide When do you need parentheses?

Name these compounds NaCl K2S (NH4)2O

NaCl 1st …Cation 2nd … Anion Naming binary ionic compounds … Monatomic- Monatomic- same name as atom ends in “ide” *For transition metals Indicate charge of the ion After the name using Roman numeral in parentheses Cation always written first, then anion NaCl

Try to name these ionic compounds BaCl2 Na2S Ca3P2 Cu2O

Cation Anion Name: KClO3 (NH4)2S Al(OH)3 FeSO4 Naming ionic compounds … Cation Anion Polyatomic – use the ion sheet!!! Name: KClO3 (NH4)2S Al(OH)3 FeSO4 Cation always written first, then anion

Do Now… Name the following: CaF2 Al2O3 NaClO4 (NH4)3PO4 PbCrO4 LiClO NaCN Cu(NO3)2 What are the rules for naming Ionic compounds?

Rules for Monatomic positive ion …. If it’s a transition metal …. Monatomic negative ion … Polyatomic ion (positive ion or negative ion) Get ready to put problems on board from HW

What are molecular compounds? What do they consist of? What type of bonding is involved?

Molecular Compounds No charges … no balancing All nonmetals Share electrons(covalent bond) to satisfy octet rule No charges … no balancing

Write the formula for Carbon dioxide Carbon monoxide Dicarbon hexahydride Prefix tells how many atoms are in the compound

Formula ---> Name Carbon dioxide Molecular (binary compound only) Second atom - ends in “ide”. Also, always add a prefix indicating how many atoms First atom - retains the name of the element Add a prefix if there is more than one of the atom Carbon dioxide

Name PH3 PCl3 SiI4 NH3 XeF4

DO NOW! When do you use parentheses? When do you use roman numerals? When do you use prefixes? Air is mainly composed of nitrogen and oxygen gases. What are the formulas of these compounds?

Jill was handed an assortment of index cards Jill was handed an assortment of index cards. Each index card had the chemical symbol for an ion Na+ Zn2+ Cl- Ni2+ O2- PO43- Al3+ Jill formed ionic compounds using index cards. She combined sodium and zinc to from the compound Na2Zn. Is this a possible ionic compound? Why or why not? 2. Jill then wrote the formulas for all the possible ionic comounds that can be formed. What formulas did she write? Name each compound. 3. Jill wrote the following compounds. Identify whether each formula is correct or incorrect. If the formula is incorrect, change it to make it correct. ZnCl3 Al3O2 Ca3(PO4)2

DO Now… What are the prefixes for the numbers 1-10? How do you name a binary molecular compound? for the first atom … for the second atom … What are diatomic molecules? List the 7 examples.

Write balanced chemical formulas for Magnesium hydroxide ) Write balanced chemical formulas for Magnesium hydroxide Calcium acetate Barium phosphide Ammonium sulfate Copper (II) fluoride Sodium sulfide Lead (III) dichromate