In this video we'll write the correct formulas for ionic compounds with transition metals ions (elements that can have varying ionic charge).
Lots more practice at:
[ Ссылка ]
To write the formula for ionic compounds with transition metals we’ll use the Periodic Table (and possibly the Common Ion Table) and follow some simple rules.
--- Keys for Naming Compounds with Transition Metals---
• Write the symbol and charge for the transition metal. The charge is the Roman Numeral in parentheses.
• Write the symbol and charge for the non-metal. If you have a polyatomic ion, use the Common Ion table to find the formula and charge.
• See if the charges are balanced (if they are you’re done!).
• Add subscripts (if necessary) so the charge for the entire compound is zero.
• Use the crisscross method to check your work.
Notes:
• Don’t write the subscript '1'.
• If you use the criss-cross method and end up with something like Ca2S2 you'll need to reduce the subscripts to Ca1S1 which we write CaS.
For a complete tutorial on naming and formula writing for compounds visit:
[ Ссылка ]
Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).
