I need help with naming binary compounds, I don't understand it.

 

With Binary (I) Compounds

Binary (II) compounds

Binary (III) Compounds

 

can someone explain to me the concept and how to name these binary compounds.

 

thanks

 

Hitman47.

element name (oxidation state, if more than one exists) polyatomic ion

are these right:

 

Co N Cobalt nitride

3

 

H S Hydrogen Sulfide

2

 

Zinc Chloride ZnCI

 

 

HBr hydrogen bromide

 

 

 

 

are these correct??

Co₃N is tricobalt nitride

 

H₂S is dihydrogen sulfide

 

Depending on your book/professor, the tri- and di- might be omittable, but technically they should be included. The rest are right (I assuming ZnCI is actually ZnCl, as the former doesn't exist)

Originally posted by Hitman47

are these right:

 

Co N Cobalt nitride

3

 

I believe Cobalt is multi-valent, the common valences being +2, +3. So if asked how to write in words, it would be Cobalt (insert # of valence e-here) Nitride using the IUPAC, or stock system.

For example using Aluminum Oxide, Al have 3+ and O is 2- ; hence you need to balance the formula which would come to Al2O3.

 

Another example: Mercury Oxide. Mercury (Hg) have 2 valence positives so you require to put the roman number after the name in IUPAC name. For example, using Hg 2+ , you will get Hg0 which is Mercury (II) Oxide.