Thae atomic number of the atom of two elements is 18 and 20. And their mass is 40. Mention the terms that can be given to relate such pairs of atoms. Will they have same chemical Properties? Justify your answer.
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Element with atomic number 18 is argon
Element with atomic number 20 is calcium
They are not similar in chemical property since argon lies on group 18 and calcium lies on group 2
Element with atomic number 20 is calcium
They are not similar in chemical property since argon lies on group 18 and calcium lies on group 2
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