| List-I (outer electronic configuration) | List-II (types of elements) |
| A. \[[Ne]3{{s}^{1}}\] | 1. alkali metal |
| B. \[[Ne]3{{s}^{2}}3{{p}^{5}}3{{d}^{0}}4{{s}^{0}}\] | 2. halogens(non-metallic) |
| C. \[[Ar]3{{s}^{5}}4{{s}^{1}}\] | 3. transition element |
| D. \[[He]2{{s}^{2}}2{{p}^{6}}3{{s}^{0}}\] | 4. inert (non-reactive) |
| 5. inner transition | |
| 6. alkaline earth metals |
A) A-1, B-2, C-5, D-4
B) A-1, B-2, C-3, D-4
C) A-6, B-3, C-1, D-2
D) A-3, B-6, C-1, D-4
Correct Answer: B
Solution :
Configuration of alkali metals\[-n{{s}^{1}}\] Configuration of halogens \[-n{{s}^{1}}n{{p}^{5}}\] Configuration of elements\[-(n-1){{d}^{1-9}}n{{s}^{0\,or\,1\,or\,2}}\] Configuration of inert elements \[-n{{s}^{2}}n{{p}^{6}}\]
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