1.

(a) In the modern periodic Table, why does cobalt with a higher atomic mass of 58.93 appear before nickel having a lower atomic mass of 58.71? (c) Why could no fixed position be given to hydrogen in Mendeleev's periodic table?

Answer»

(a) In the modern periodic Table, why does cobalt with a higher atomic mass of 58.93 appear before nickel having a lower atomic mass of 58.71?

(c) Why could no fixed position be given to hydrogen in Mendeleev's periodic table?



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