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प्रश्न
State any five features of modern periodic table.
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उत्तर
- All the elements are arranged in the increasing order of their atomic number
- The horizontal rows are called periods. There are seven periods in the periodic table.
- The elements are placed in periods based on the number of shells in their atoms
- Vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table
- Based on the physical and chemical properties of elements, they are grouped into various families.
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संबंधित प्रश्न
Write the merits of the modern periodic table over Mendeleev’s Periodic table
What is the name of those elements which divide metals and non-metals in the periodic table?
Name the scientist who prepared modern periodic table.
Name two elements in each case: Lanthanides
State its position in the periodic table?
Answer the following in respect of element `31/15 P`
Give its electronic configuration
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Calcium
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?
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
