Download presentation
Presentation is loading. Please wait.
Published byAnabel Black Modified over 9 years ago
1
Naming Binary Ionic Compounds
2
What is a binary ionic compound? IONIC COMPOUND – Formed from ionic bonds – Metal and nonmetal Left of stepline on PT=metal Right of stepline on PT=nonmetal BINARY – Prefix “bi” means 2 – A binary compound contains teo different kinds of elements
3
A Common Example NaCl – Na=sodium=metal=cation – Cl=chlorine=nonmetal=anion – Two elements joined by an ionic bond Na loses electron to form positive ion Cl gains electron to form negative ion Ions are attracted by electrostatic charges
4
How do we name it? Name the metal Na Sodium Name the non-metal with an “-ide” ending Cl Chlorine Chloride
5
NaCl sodium chloride
6
Is it always this easy? Almost…but not quite! Group 1,2, and 13 metals have charges determined by their position on the periodic table…1+, 2+. 3+ Ag is always 1+ Cd is always 2+ Zn is always 2+
7
Transition metals The charges of transition metal cations (and a few others under the stepline) vary The charge of these cations must be calculated to balance the negative charge of the anions involved
8
CuS is copper (II) sulfide Copper can have different charges What is it paired up with and what ratio is needed to have a net charge of zero? The anion is sulfide – Sulfur produces a sulfide ion which is 2-. (You know this from the periodic table.) The cation is copper – One Cu is present, so its charge must be 2+ to balance the 2- charge from the S Name cation, show charge as Roman numeral in parentheses, name anion with -ide ending.
9
Fe 2 S 3 is iron (III) sulfide Sulfide is 2- (from its position on periodic table) There are 3 sulfide 3 x 2- = 6- Iron can have different charges 2 iron ions balance a 6- charge 2 x ? = 6+ Iron’s charge in this compound is 3+ Name cation, show charge as Roman numeral in parentheses, name anion with -ide ending. Reverse criss-cross!
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.