WAEC Chemistry 2015 Theory — Question 14
Question 14 of 49 from the West African Examinations Council (WAEC) Chemistry 2015 Theory paper, with the correct answer and a full explanation.
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2(a)(iii). How many neutrons are there in Q? (Consider the table: Element J, O, R, X, Y with given Atomic and Mass numbers.)
Model answer
Number of neutrons = Mass number − Atomic number. Using the atomic and mass numbers given for the relevant element in the table, the neutron number is calculated as mass number minus atomic number.
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