Question

(iv) Elements P, Q, R, S have atomic numbers 11, 15, 17 and 18

respectively. Which of them are reactive non-metal?

(a) P and Q (b) P and R

(c) Q and R (d) R and S​

Answer 1

Answer:

option c is correct

Explanation:

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Answer 2

Answer:

We are given that elements P,Q ,R, and S have atomic numbers 11, 15,1 7, and 18. We have to find reactive non - metals in given elements. Therefore, P is sodium. Therefore, Q is phosphorus.