Question 47 of 48intermediate🔧 ApplyMCQ1 mark

Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is:

Exercise: EXERCISES | Q: 3.39 | (Page 26)
For More Understanding

Explanation

Option (C) is correct. Non-metallic character increases as we move from left to right across a period and decreases as we move down a group (since metallic character increases down a group). In Period 2, the order of increasing non-metallic character is B < C < N < F. Comparing C and Si (Group 14), Si is below C, so Si is more metallic and less non-metallic than C. Thus, the overall order of non-metallic character is F > N > C > B > Si.

Solution Steps

  1. Step 1: Non-metallic character increases from left to right across a period. In Period 2, the elements are B, C, N, and F, so their non-metallic character order is B < C < N < F.

  2. Step 2: Metallic character increases down a group, meaning non-metallic character decreases down a group. Comparing C (Period 2, Group 14) and Si (Period 3, Group 14), Si is less non-metallic than C.

  3. Step 3: Combining these trends, the overall decreasing order of non-metallic character is F > N > C > B > Si.

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