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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
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Explain why, the noble gases are placed in a separate group.
Name two elements in Inert gas.
Give the symbol and valency of the following element and radical.
Bisulphite
State the number of elements in Period 2 of the Periodic Table.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
The inert gas which lies in the third period is ______
Which of the following elements will form an acidic oxide?
