Entry Task: November 9 th Friday Provide the formula and name for the following: MgP and Lithium nitride TURN IN ENTRY TASK SHEET

Agenda: Notes on Transitional elements In-class practice on part of homework Finish the rest of sheet for homework

Transitional Elements USE THE BACKSIDE OF BINARY T-METAL SHEET

Cations When these atoms become ions they lose electrons thus becoming a positive charge. +1 Li Na K Rb H Cs Be Mg Ca Sr Ba +2 Transitional Elements Al Fe Ni CuZn Pb MnCo Ag Au Cd Hg B +3 C Si Ge +4 Transitional elements can change charges. To know the charges we use Roman numerals. Iron (III) ion is Fe +3 Copper (I) ion is Cu +1 Lead (IV) ion is Pb +4 Sn

Cations Transitional elements can change charges. Iron (III) ion Copper (I) ion Lead (IV) ion Tin (IV) ion How do you know the charges? We use Roman numeral to denote the charge. +1 charge is ( I ) +2 charge is ( II ) +3 charge is ( III ) +4 charge is ( IV ) +5 charge is ( V ) Fe +3 Cu +1 Pb +4 Sn +4

Provide the symbol and charges for the following Calcium Iron II Magnesium Potassium Lead III Gold II AluminumAl +3 Tin IV Ca +2 Fe +2 Mg +2 Pb +3 K +1 Au +2 Sn +4

Some exceptions There are three transition elements which do not require a Roman Numeral because they have single definite charges. These are Zinc – Zn +2 Cadmium – Cd +2 Silver – Ag +1 You need to remember the charges for these.

Some exceptions Mercury’s has a twist Mercury I – Hg 2 1+ Mercury II – Hg +2 You need to remember this as well

Let’s practice! 1. ZnCl Barium hydride 2. MgF Nickel (II) iodide 3. FeO 33. Iron (II) sulfide 4. CoCl Chromium (III) chloride 5. VCl 5 Chlorine is -1 (2 ) = -2. Cation= +2 Zinc chloride Ba = +2 H= -1 = BaH 2 Fluorine is -1 (2 ) = -2. Cation= +2 Magnesium fluoride Ni = +2 I = -1 = Ni I 2 Oxygen is -2 (1 ) = -2. Cation= +2 Iron II oxide Fe = +2 S= -2 = FeS Chlorine is -1 (2 ) = -2. Cation= +2 Cobalt II chloride Cr = +3 Cl= -1= CrCl 3 Chlorine is -1 (5 ) = -5. Cation= +5 Vanadium V chloride

HW: Finish the rest of Binary T-metal ws