1 mole of a diatomic element X_2 contains 34 and 40 moles of electrons and neutrons respectively. The isotopic formula of the element is:

1 mole of a diatomic element X_2 contains 34 and 40 moles of electrons

1.	1 mole of a diatomic element X_2 contains 34 and 40 moles of electrons and neutrons respectively. The isotopic formula of the element is:
Answer» `""_(34)^(74)X` `""_(17)^(37)X` `""_(34)^(40)X` `""_(20)^(40)X` ANSWER :B