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प्रश्न
What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?
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उत्तर
The last elements of each period have their outermost shell complete, i.e. 2 or 8 electrons. Main characteristics of the last element in each period of the Periodic Table are:
- They have valency equal to zero.
- They react under very special condition otherwise they don't react.
- They have stable gas electronic configuration.
- The general name is inert gases or noble gases.
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संबंधित प्रश्न
Write the names from the description.
The metalloids in the second and third periods.
Write a short note on the following type of element –
transition elements
Write a short note on the following type of element –
normal elements
Statement: Elements in a group generally possess similar properties but elements along a period have different properties.
Reason: The difference in electronic configuration makes the element differ in their chemical properties along a period.
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1’then it will
occupy ______ block of the periodic table.
What are the s-block elements?
Group 1 (except hydrogen) elements are called alkali metals.
d-block elements are called transition elements.
Answer the following questions related to the modern periodic table.
Name the blocks with the groups that they consist of.
Answer the following questions related to the modern periodic table.
Which block elements are known as transition elements?
