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प्रश्न
What are the periods in a periodic table? Give two characteristics of each.
उत्तर
Periods are the horizontal rows of elements in the periodic table.
Characteristics of periods:
1. Elements of the same period have the same number of shells.
2. The valency of elements in the same period changes, and therefore, the elements in a period exhibit different chemical properties.
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संबंधित प्रश्न
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