Question

   

A．所含質(zhì)子數(shù)=A-n

B．所含中子數(shù)=A-Z

C．所含電子數(shù)=Z+n

D．質(zhì)量數(shù)=Z+A

Answer 1

B

解析:

①質(zhì)量數(shù)=質(zhì)子數(shù)+中子數(shù)

所以該微粒的質(zhì)子數(shù)=Z，電子數(shù)=Z-n，質(zhì)量數(shù)=A，中子數(shù)=A-Z，則B正確。