Science Starter: • Using your notes from last week, describe the difference between a covalent bond and an ionic bond. Today’s Agenda: • Atomic Bonds Virtual Lab • Atomic Bonds Game and Review • Compounds EdPuzzle Review • What are the outer-most electrons of an atom called? Review • What are the two main types of bonds we discussed? Review • What are the differences between the two types of bonds? Today: • Complete the covalent bonding virtual lab. 1. To access the lab, go to my website, go the ‘Useful Links’ tab, click on Physical Science, and choose ‘Bonds Virtual Lab’. 2. On the left, scroll to the bottom and read the procedure. 3. Write the molecules you build on a piece of paper. 4. After you have completed the procedures and drawn your molecules, click on the ‘Journal’. Answer the questions on your paper. • Play “Collisions”, an ionic bonding game. 1. To access the game, go again to the ‘Useful Links’ tab on my website and choose ‘Collisions’. 2. Play all the way to Level 6. When you beat level six, raise your hand so I can check your work for completion. • Complete the Ionic Compounds EdPuzzle. Exit Ticket: • Grab a book and turn to page 564. Complete the Section 2 Review, questions 8-11, using your notes and the book. Science Starter: • Using the Bohr model, draw the following atoms bonded together: • H2O • CH4 • O2 (this is a double bonded molecule!) Today’s Agenda: • Writing Formulas Notes • Writing Formula Worksheets and Game Bonds Review Writing Formulas • Oxidation number: positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable Writing Formulas • For ions, charge is oxidation number • Patterns seen on the Periodic Table Writing Formulas • Binary compound: two ions combined • When put together, two charged ions are neutral Writing Formulas • What about elements with unequal positive and negative charges? Writing Formulas • Write the symbol of the element that has the positive oxidation number. • Write the symbol of the element with the negative oxidation number. • Find the least common multiple of the charges. The charge (without the sign) of one ion becomes the subscript of another ion. Exit Ticket: • Write formulas for the following compounds: potassium iodide, phosphorus pentachloride, dichlorine heptoxide Science Starter: • Write the formulas for the following compounds: • Potassium sulfide • Lithium nitride • Lead (IV) phosphide Today’s Agenda: • Naming Compounds Notes and Worksheets • Naming Compounds Edpuzzle Naming Ionic Compounds • Write the name of the positive ion. • Using table, check to see whether the positive ion forms more than one oxidation number. If so, determine the oxidation number of the ion from the formula of the compound. Write the charge of the positive ion using roman numbers in parentheses after the ions name. • Write the root name of the anion. • Add the ending –ide to the root. Naming Ionic Compounds • CuCl • AlCl3 • Cr2O3 Naming Compounds • Polyatomic ion: positively or negatively charged covalently bonded group of atoms • Made of more than one element but act as one ion Polyatomic Ions • Follow same steps, but when more than one polyatomic ion is needed to balance the charges of the ions, write parentheses around the polyatomic ion before adding the subscript. Polyatomic Ions • Barium chlorate • Sodium phosphate • Aluminum carbonate Polyatomic Ions • For naming polyatomic ions: • Write name of positive ion. • Write name of negative ion. • Sr(OH)2 Covalent Compounds • Between nonmetals • Can combine in a variety of ways, so need prefixes to indicate number Covalent Compounds • Mono- only used for second atom • N2O • NO • NO2 • N2O5 Exit Ticket: • Write the names of the following: • Al2O3 • Ba(ClO3)2 • SO2 • NH4Cl • PCl3 Science Starter: • Write the chemical names for: • Fe2S3 • Cu(ClO3)2 • Ca3(PO4)2 • (NH4)2SO4 Science Starter: • Write the chemical names for: • • • • Iron (III) sulfide: Fe2S3 Copper (II) chlorate: Cu(ClO3)2 Calcium phosphate: Ca3(PO4)2 Ammonium sulfate: (NH4)2SO4 Today’s Agenda: • Name Game! • Complete work for the week • Kahoot!