Class 10 > Science

Question

(a) State two main characteristics of elements on which modern periodic table is based. (b) No fixed position can be assigned to hydrogen in the periodic table. Why?
Medium

Solution

(a) (i) Atomic number (ii) Valence electrons (b) It is because hydrogen resembles with Group 1 as well as Group 17 elements, therefore no fixed position can be assigned to it.

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