Question
Download Solution PDFWhich among the following elements has maximum atomic radius ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Potassium.
Key Points
- Potassium belongs to a group - (1) and period - (IV) of the periodic table. Hence among the given options, Potassium has a maximum atomic radius.
- Carbon and Nitrogen belong to the period - (II) of the periodic table and on the right side hence it is obvious that atomic radii of Carbon and Nitrogen are very much small than Sodium and Potassium.
- Sodium and Potassium belong to a group - (1) and Potassium is placed below Sodium hence the atomic radius of Potassium more than Sodium.
Important Points
- The atomic size generally decreases across a period as we move from left to right in a particular period. due to an increase in nuclear charge.
- The atomic size generally increases across groups as we move from top to bottom in a particular group due to the addition of new shells to atoms.
Additional Information
| Element | Group | Period | Atomic Number |
| Carbon | 14 | II | 6 |
| Nitrogen | 15 | II | 7 |
| Sodium | 1 | III | 11 |
| Potassium | 1 | IV | 19 |
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