MCQOPTIONS
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| 1. |
An atom with atomic number 21 belongs to the category of [Kurukshetra CEE 1991] |
| A. | \[s\]-block elements |
| B. | \[p\]-block elements |
| C. | \[d\]-block elements |
| D. | \[f\]-block elements |
| Answer» D. \[f\]-block elements | |