What is the mass mumber of an element?ps:Please answered in EnglishI want the define of "mass mumber of an element"
问题描述：
What is the mass mumber of an element?ps:Please answered in English
I want the define of "mass mumber of an element"
答
O H N Cl C P S
K Ca Na Mg Al Zn Fe Cu Hg Ag Mn Ba
答
Also consult your chemistry books?
答
the mass number of an element is used in chemistry, it ls the sum of the number of neutron and proton of an element