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प्रश्न
Compare Modern Periodic Law with Mendeleev's Periodic Law.
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उत्तर
Modern Periodic Law:
- Basis is “properties of elements depend on electronic configuration.” Elements are arranged in increasing atomic number.
Mendeleev's Periodic Law:
- Basis is “properties of elements are a periodic function of atomic mass.”
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संबंधित प्रश्न
Give two example of group 18 elements.
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name two elements in each case: Lanthanides
What do you understand by typical elements?
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
