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प्रश्न
Elements in the modern periodic table are arranged in ______groups and______ periods.
विकल्प
7, 18
18, 7
17, 8
8, 17
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उत्तर
Elements in the modern periodic table are arranged in 18 groups and 7 periods.
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संबंधित प्रश्न
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
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