Chemistry, asked by nisaraliphe2003, 10 months ago

20. The mass number of 'Xeis:
b. 77
C. 131
a. 54

Answers

Answered by amandeepdhawan29

1

Answer:

54

Explanation:

54 is correct answer

Answered by priyasingh110059

0

Answer:

c=131.. hope it will help you

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