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प्रश्न
Distinguish between:
Group - Period
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उत्तर
| Sr. No. | Group | Period |
| 1. | The vertical columns of elements in the modern periodic table are called groups. | The horizontal rows of elements in the modern periodic table are called periods. |
| 2. | There are 18 groups. | There are 7 periods. |
| 3. | The properties of all the elements in a group show similarity and gradation. | The properties of elements change slowly from one end to the other in a period. |
| 4. | While going from top to bottom within any group, the number of shells goes on increasing | While going from left to right within a period, the number of shells occupied by electrons remains the same. |
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संबंधित प्रश्न
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ii. What is the valency of this element?
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Right or wrong sentence.
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Group
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