1.

The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is : (a) A (b) B (c) C (d) D

Answer»

The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is :

(a) A

(b) B

(c) C

(d) D



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