Question

find the mass no. of oxygen and sulphur atom
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Answer 1

Answer:

Oxygen mass number :- 16

Sulphur mass number:- 32

Answer 2

Answer:

oxygen=16u

sulphur=32u

Explanation:

u can learn it by a trick all the elements f atomic number even then their mass=2×even atomic number

and in odd atomic no . their mass is =2×odd atomic number+1