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प्रश्न
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
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उत्तर
Group number signifies the number of electrons in the outer shell of an atom of the element.
- Number of electrons in the outer shell of all elements in a group is the same.
- Hence all elements in the same group of the periodic table have the same ‘Valency’ and similar ‘Chemical properties’.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
The modern periodic table was prepared by ______.
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
Name two elements in Inert gas.
Noble gases belong to______ group of the periodic table.
______ is the longest period in the periodical table.
On moving from left to right in a period in the periodic table, the size of the atom ______
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
Give reason for the following:
Inert gases do not form ion.
