Naming Compounds

Question 1

What are binary compounds

Answer 1

compounds that consist of atoms of 2 elements
(mostly a metal and a non-metal)

Question 2

How do you name a binary ionic compound?

Answer 2

• name the metal ion first, then the non-metal
• if the metal is a TRANSITION METAL, it can have more than one charge (roman numerals in brackets after the name of the metal to indicate charge)
• the suffix of the non-metal is changed to ide (ex. oxygen –> oxide)

example: Fe2O3
~ Iron (III) oxide

example: Ca (NO3)2
~ calcium nitrate

example: AuCl3
~ Gold (III) chloride

Question 3

What’s a binary molecular compound?

Answer 3

compounds that are made up of 2 nonmetals

ex: CO2
~ carbon dioxide

Question 4

How do you name a binary molecular compound?

Answer 4

• name the element with the lower group # first
• exception: if oxygen is combined with a halogen (group 7) then the halogen is named first
• name of the 1st element is unchanged
• add ide to the suffix of the second element
• if there are two or more atoms of the first atom, indicate the # of atoms
• always add a prefix to the second element to show the # of atoms

ex: N2O4
~ dinitrogen tetroxide

ex: SF6
~ Sulfur hexafluoride

ex: PCl5
~ phosphorus pentachloride

Question 5

What’s the family of 4 for polyatomic ions?

Answer 5

CIO4 - = perchlorate
CIO3 - = chlorate
CIO2 - = chlorite
CIO - = hypochlorite

~ look at notebook for more details and practice

Question 6

What does the prefix thio mean?

Answer 6

it means that an oxygen in the compound has been replaced by a sulfur atom

EX: SO4 ^2- is Sulphate
~ S2O3 ^2- = thiosulphate
~ S2O2 ^2- = thiosulphite

Question 7

how would u name the following:
a) HPO4 ^ 2-
b) H2PO4 ^-

Answer 7

a) hydrogen phosphate
b) dihydrogen phosphate

Question 8

What’s a peroxide?

Answer 8

An oxygen ion that will only bond with group 1 elements

ex: Fr2O2
~ francium peroxide