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प्रश्न
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
उत्तर
The last elements in the periods of the periodic table have their valence shells completely filled with electrons. They are known as noble or inert gases. Their valency is zero.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Fill in the following blank with suitable word:
Group 1 elements are called ...............
Name the scientist who prepared modern periodic table.
Name two elements in Inert gas.
Name two elements in each case:
Transition element
Name two elements in each case: Lanthanides
Distinguish between:
s-block - p-block
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
