Today’s Do Now Write the formula for the following names using the criss-cross method and the polyatomic ion chart: 1. Strontium iodide 2. Manganese (II) sulfide 3. Potassium sulfate 4. Iron (III) nitrite When finished, begin reading the dihydrogen monoxide article

Ionic Compound Hints If the compound ends in: -ide, it is a monatomic anion and is an element on the periodic table -ite or –ate, it is a polyatomic ion

Ban Dihydrogen Monoxide 1. How can Summit expose you to such a dangerous substance? 2. What can we do as a chemistry class to stop this?

By the end of the class period today, I will be able to… Write the formula for a covalent compound Construct electron dot formulas to illustrate covalent bonds Dinitrogen dioxide is N 2 O 2

Today’s Game Plan Do Now10 minutes Formulas for Covalent Compounds 10 minutes Practice5 minutes Putting it all together!10 minutes Naming Covalent Compounds15 minutes Exit Ticket and Closing10 minutes

Covalent Compound can also be known as a Molecule Molecule: a neutral group of atoms held together by covalent bonds (electrons are shared within a molecule)

Steps to Write Formulas for Covalent Molecules: 1. Write the symbol for each nonmetal 2. Indicate the number of atoms of the elements by writing subscripts (besides the number 1, which is already implied by writing the element symbol)

Prefixes for Covalent Compounds mono- di- tri- tetra- penta- hexa- hepta- octa- nona- deca

Examples: Boron trifluoride Diarsenic Pentoxide

Today’s Game Plan Do Now10 minutes Formulas for Covalent Compounds 10 minutes Practice5 minutes Putting it all together!10 minutes Naming Covalent Compounds15 minutes Exit Ticket and Closing10 minutes

Puzzle Match the name and formula for the covalent molecules

Today’s Game Plan Do Now10 minutes Formulas for Covalent Compounds 10 minutes Practice5 minutes Putting it all together!10 minutes Naming Covalent Compounds15 minutes Exit Ticket and Closing10 minutes

Putting it all together… Write the names of the following compounds and molecules. 1. Gold (II) chloride 2. Tetraphosphorous decoxide

Group Practice 1. potassium carbonate 2. dinitrogen tetroxide 3. magnesium hydroxide 4. tricarbon pentabromide 5. tin(IV) oxide

Today’s Game Plan Do Now10 minutes Formulas for Covalent Compounds 10 minutes Practice5 minutes Putting it all together!10 minutes Naming Covalent Compounds15 minutes Exit Ticket and Closing10 minutes

By the end of the class period today I will be able to… Name Name covalent compounds when given a formula Example: N 2 O 5 is dinitrogen pentoxide

Today: Covalent Compounds (nonmetals only) compounds made up of two different nonmetals

Rules for Naming Covalent Compounds 1. The first element in the formula (least electronegative) is named first and the full element name is used. 2. The second element is named with (- ide) ending 3. Prefixes are used to show the numbers of atoms present 4. The prefix mono- is never used for naming the first element.

Prefixes for Covalent Compounds mono- di- tri- tetra- penta- hexa- hepta- octa

Sample Problem 1 Write the name for SO 3

Sample Problem 2 Write the name for N 2 O 5.

Halloween Contest!

Write the name for As 2 O 5

As 2 O 5 Diarsenic pentoxide

This is Halloween! What is this couple’s costume?? PB&J Sandwich

Write the name for NCl 3

NCl 3 Nitrogen Trichloride

Write the name for CI 4

CI 4 Carbon Tetraiodide

This is Halloween! Which ghost is the best dancer?? The Boogie Man!!!

Write the name for CaBr 2

CaBr 2 Got You!!! Calcium Bromide

Today’s Game Plan Do Now10 minutes Formulas for Covalent Compounds 10 minutes Practice5 minutes Putting it all together!10 minutes Naming Covalent Compounds15 minutes Exit Ticket and Closing10 minutes

Today’s Homework Covalent Naming HW