If Boron has two isotopes one of 10u and the other 11u and the average – McqOptions

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1.	If Boron has two isotopes one of 10u and the other 11u and the average mass of boron atom is 10.8u, then the ratio of abundance of the two isotopes of masses 10u and 11u is _______.
A.	1/4
B.	4/1
C.	3/1
D.	1/3
Answer» B. 4/1

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