Binary Ionic and Binary Covalent

Binary Ionic 
- Positively charged ions are called cations
- Negatively charged ions are called anions
- The cation is always named first.

• Simple binary ionic compounds contain only a kind of metal cation and a kind of nonmetal anion.
• They are the compounds formed from the metal cation and the nonmetallic anion, such as sodium chloride - NaCl. Most ionic compounds are binary compounds, or compounds formed from just two elements. The naming conversion is such that the anion is named by taking the first part of the element name (chlorine) and adding -ide.

 consisting of the unambiguous stem of the more electronegative element with an -ide suffix.  Greek prefixes are not used with ionic compounds.

BaCl2	K2O
barium chloride	potassium oxide

    When more than one compound is possible for the two elements, either the oxidation state of the less electronegative element is indicated with a Roman numeral or, if possible, the stem of that element's name (frequently based on the Latin or Greek) is used with an -ous or -ic suffix.  

                                        CuS                                                                        Cu2S

                                  copper(II) sulfide                                                    copper(I) sulfide

                                     cupric sulfide                                                         cuprous sulfide

Binary Covalent 

Binary covalent compounds are compounds made up of only two elements, such as carbon dioxide. Prefixes are used in the names of binary compounds to indicate the number of atoms of each nonmetal present.

Common Prefixes for Binary Covalent Compounds

Number of Atoms	Prefix
1	mono-
2	di-
3	tri-
4	tetra-
5	penta-
6	hexa-
7	hepta-
8	octa-
9	nona-
10	deca-

Example:

carbon dioxide:

tetraphosphorus decoxide:

sulfur trioxide:

dinitrogen tetroxide:

Group 2:

Espuerta

Zablan

Silvestre

Villanueva

Lopez