Ionic Bonds 08/30 & 08/31

Catalyst Take out your HW to be stamped. Mystery Elements: 1.Forms an ion with a 2+ charge, found in milk. 2.Forms an ion with a 2+ or 3+ charge, transition metal, atomic mass 50.9.

Catalyst: Mystery Elements 1.Calcium Calcium Carbonate Ca CO 3

Catalyst: Mystery Elements 2. Vanadium

Homework Baseball Answer the questions on a blank sheet of paper. Use your homework. 1.Ionic compounds form a structure called a… (a)Molecule (b)Crystal lattice (c) mixture 2.What forces hold together the ions in a salt?

Homework Baseball Answers 1.Ionic compounds form a structure called a… (a)Crystal lattice 2.What forces hold together the ions in a salt? Attractive electrostatic forces between the positive cations and negative anions hold the ionic compound together. (HW Q 1)

Homework Answers 8. (a) Chlorine and Bromine will not form an ionic bond because both are nonmetals (halogens) and both form negative ions (anions). (b) Potassium and Helium will not form an ionic bond because Helium is a noble gas which is unreactive. (c) Sodium and Lithium will not form an ionic bond because they are both metals (alkali metals) that form positive ions (cations). 180: 6. (a) Sodium Oxide = Na 2 O (b) Magnesium phosphide = Mg 3 P 2 (c) Silver(I) Sulfide = Ag 2 S (d) Niobrium(V) chloride = NbCl 5

Objectives I can predict the formula formed by any simple cation and anion. (i.e. Ca 2+ + F - → CaF 2 ) I can predict the formula of an ionic compound based on its name (i.e. sodium nitride = Na 3 N) CHALLENGE: I can use ionization energy data to explain ion formation.

Agenda Catalyst Warmup: Find Your Ionic Bond! Ionic Bond Practice Activity Ionization Energy Graphing Challenge Exit Ticket

Instructions: –You will get a card with an element symbol and the number of electrons the element must lose or gain to form a full valence shell (to meet the octet rule). –Your task is to find an ionic bond match in the class. –Example: If my card says “Ra - lose 2”, I would look for someone in class whose card says “gain 2”. –Once you find your match, come show Ms. Boon your cards. –HERE’S THE CATCH! THIS IS A SILENT ACTIVITY – FIND YOUR MATCH BY SHOWING YOUR CARD ONLY. Find Your Ionic Bond!

Agenda Catalyst Warmup: Find Your Ionic Bond! Ionic Bond Practice Activity Ionization Energy Graphing Challenge Exit Ticket

Write: groups tell us # valence electrons

Ionic Bond Practice Activity Work with the person next to you. Materials: two sheets of ion puzzle pieces, one answer sheet, scissors, and glue stick. Construct the ionic compounds listed on the answer sheet out of the puzzle pieces provided. #1-5 Both the anion and cation puzzle pieces are provided. #6-8 One puzzle piece is provided and you must use the octet rule to predict the rest of the compound. Draw the other half in. Then write the formula of the compound formed. Cleanup: Put all scraps of paper in the trash.

Agenda Catalyst Warmup: Find Your Ionic Bond! Ionic Bond Practice Activity Ionization Energy Graphing Challenge Exit Ticket

Ionization Energy Investigation Ionization energy is the energy required to remove an electron from an atom. In this activity you will investigate the ionization energies of different atoms and use this information to explain and predict ion formation. Follow the directions on the worksheet to graph the ionization energies for the 1 st 20 elements. Then, answer the 6 questions on a separate sheet of paper.

Agenda Catalyst Warmup: Find Your Ionic Bond! Ionic Bond Practice Activity Ionization Energy Graphing Challenge Exit Ticket