University:
Felician University
Course:
CHEM-001 | Basic Chemistry
Academic year:

2023
Views:

394

Pages:

4
Author:

SpaceCadet101

Naming Polyatomic Ions Kinds of Ions • “Mono”: one • “Di”: two • “Tri”: three • “Poly” : many • “Atomic” : atoms • Monatomic ions: Ions that contain one atom • Diatomic ions: Ions that contain two atoms • Triatomic ions: Ions that contain three atoms • Polyatomic ions: Ions that contain many atoms • They can be cations or anions. Polyatomic Ions • Polyatomic ions are many atoms that together are cations or anions • They usually end in “ate” or “ite” • Polyatomic ion names and their chemical formulas can be found on the back of your periodic table • Examples: Phosphate, sulphate, ammonium, cyanide Naming compounds with Polyatomic Ions • Follow the same steps as naming ionic compounds • The charges on polyatomic ions are like regular charges of elements on the periodic table • Cation is written first (Can be a metal or a polyatomic ion) • Anion is written second (Can be a non-metal or a polyatomic ion) • Examples: • Ammonium iodide: • Calcium nitrate: NH4I Ca(NO3)2 Cation: NH4+ Cation: Ca2+ Anion: IAnion: NO3-