1.

The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is : (a) P (b) Q (c) R (d) S

Answer»

The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is :

(a) P (b) Q (c) R (d) S



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