Answer:
This is correct,
In covalent compound , the prefix of the first element is always ignored but the prefix in second element depend on the subscript of the element . In ionic compound the subscript does not affect the name of compound.
Step-by-step explanation:
Ionic Compound : Those compound which are formed by complete transfer of electron from one atom to other. Here One element get negative charge and called anion. The other get Positive charge and called cation.
Ionic compounds are symmetrical from each side: They are non- directional in nature.
Hence ionic compound are named without subscript (di.tri, tetra)
example:
CaCl2 = Calcium chloride(not dichloride)
KCl= potassium chloride
AlCl3 = Aluminium chloride(not trichloride)
2. Covalent compound: Those compounds which are formed by sharing of electrons. There is not complete transfer of electrons in covalent compound. The electrons are localised more near one atom called electronegative element.The element which do not have tendeny to pull the electron cloud are electropositive.
For example :
In CO2 , O = electronegative and C= electropositive
Covalent compound undergoes hybridisation which are directional in nature.
Hybrid orbital are effective only in particular direction..
While naming covalent comound :
- electropositive is named first
- The electronegative is named after (O , N ,F)
- The subscript "di ,tri , tetra are used for 2., 3 , 4 of electronegative element"
The prefix of the first element is always ignored but the prefix in second element depend on the subscript of the element.
NO2 = Nitrogen Dioxide (subscript di for 2 Nitrogen)
CO2 = Carbon dioxide
SO3 = sulphur trioxide