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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?
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 name from the description.
Two elements having valency 4.
Write a short note on the following type of element –
normal elements
d-block elements are otherwise known as ______.
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1’then it will
occupy ______ block of the periodic table.
______ block element is placed at the bottom of the periodic table.
What are the s-block elements?
Group 1 (except hydrogen) elements are called alkali metals.
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
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.
How are elements placed around the zig-zag line in the p-block of the periodic table?
