Question

An element X has three isotopes with atomic masses X-100 , X-101, X 102 . Their relative abundance is 30 % , 40 % and 30 % respectively . Find average atomic mass .

Answer 1

2%

Average atomic mass =100∑% abundance × A.M​

20.18=10020×90+x×21+(10−x)22​

2018=1800+21x+220−22x

x=2020−2018

x=2%

Explanation:

Answer 2

Explanation:

your answer in attachment ⇢ ⇢ ⇢