The composition of two atomic particles is given below : X YProtons : 8 8Neutrons : 8 9Electrons : 8 8(i) What is the mass number of X ?(ii) What is the mass number of Y ?(iii) What is the relation between X and Y ?(iv) Which element/elements do they represent ?
(i) Mass number of X = 8+8 = 16
(ii) Mass number of Y = 8+9 = 17
(iii) X and Y are isotopes, as they have the same number of protons but different number of neutrons.
(iv) X and Y can represent the isotopes of oxygen.
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