題組內容
14. There are only two isotopes, 
and 
, in naturally occurring copper.
(a) The relative atomic mass of copper is 63.55. Calculate the percentage of 
in the naturally occurring element. (3 points)
阿摩線上測驗
登入
阿摩線上測驗
登入
14. There are only two isotopes, and , in naturally occurring copper.
(a) The relative atomic mass of copper is 63.55. Calculate the percentage of in the naturally occurring element. (3 points)