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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
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?
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
How many periods and groups are there in the long form of periodic table?
Explain why, the noble gases are placed in a separate group.
What is a group in the periodic table?
Name the type of elements which have two outermost shell incomplete.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
State the number of elements in Period 2 of the Periodic Table.
Distinguish between:
Group 17 - Group 18
Explain the position of hydrogen in the periodic table.
