超一流的化学高手、化学专家请进(0001)

How are binary nonmetal-nonmetal compounds named
译：两种非金属形成的化合物怎么命名?
Ans:put the element which has stronger oxidization(氧化性) behind the weaker one.
How are metal-nonmetal compounds named?
译：金属和非金属形成的化合物怎么命名?
Ans:put the metal element behind the nonmetal one.
Explain why it is necessary to use the prefixes mono(一),di（二）,tri（三）,etc.,more often for covalent(共价的) compounds than for ionic compounds .
Ans:because the covalent(共价的) compounds have many isomers（同分异构体）but ionic compounds don't have.
可以吗?

No points?