90 likes | 217 Views
Naming Ionic Compounds. 1) Name the cation (metal) This one is always first in the formula. 2) Name the anion (nonmetal) **if it is a polyatomic ion write the name **if it is a single element change ending to ide ****if it sounds awkward…it is most likely wrong. Examples. CaCl 2
E N D
1) Name the cation (metal) This one is always first in the formula. 2) Name the anion (nonmetal) **if it is a polyatomic ion write the name **if it is a single element change ending to ide ****if it sounds awkward…it is most likely wrong.
Examples CaCl2 Mg(NO3)2
3) If the formula has a star by it, then it will have a Roman numeral. To find the Roman numeral, undo the criss-cross. Go to the end of the formula and work backwards
Examples FeCl3 Ask: where did that number, 3, come from? FeCl3 (Work backwards, uncross numbers) example: FeCl3 = Fe 3+Cl- FeCl3 is iron 3+ so the name is iron (III) chloride
Common Roman Numeral Metals • Iron • Lead • Copper • Tin • Chromium • Nickel • Mercury • Cobalt
CuNO3 Copper(I) nitrate
Worksheet Fe2S3 iron(III) sulfide
CaBr2 calcium bromide