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प्रश्न
State modern periodic law.
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उत्तर
It states that "The physical and chemical properties of the elements are a periodic function of their atomic numbers." According to this law, if we arrange the elements based on their increasing atomic numbers, we find that the elements with similar physical and chemical behaviour will be grouped together after a certain interval of elements.
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संबंधित प्रश्न
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
State the modern periodic law.
Give the symbol and valency of the following element and radical.
Calcium
Give the chemical formula of calcium phosphate
______ forms the basis of the modern periodic table.
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?
Name the non-metals in the first twenty elements.
Give reason for the following:
Inert gases do not form ion.
