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Define periodic law. Why was it necessar...

Define periodic law. Why was it necessary to change the basis of calssification from atmic masses to atomic numbers?

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MBD-PERIODIC CLASSIFICATION OF ELKHOENTS-EXAMPLE
  1. How does atomic size of elements vary on moving from left to right in ...

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  2. How does atomic size of elements vary on moving from top to bottom in...

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  3. Define periodic law. Why was it necessary to change the basis of calss...

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  4. What do you understand by the term periodicity? Do the properties of t...

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  5. What are limitation of doberiner's classification of elements?

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  6. What property do all elements in the same column of the periodic table...

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  7. Indicate the atomic number of non metals of period 3 of modern period...

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  8. Indicate the atomic number of elements of period 3 of modern periodic ...

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  9. Indicate the atomic number of elements of period 3 of modern periodic ...

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  10. Indicate the atomic number of elements of period 3 of modern periodic ...

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  11. Define atomic radius, give its units.

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  12. How does atomic radius vary down a group and along a period?

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  13. Write down the electronic configuration of elements with atomic number...

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  14. Locate the following group in the table:alkali metals

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  15. Locate the following group in the table: halogens

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  16. Locate the following group in the table: alkaline earth metals

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  17. Locate the following group in the table: noble gases.

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  18. What properties do the elements in the same vertical column of the per...

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  19. Wrtie the chemical electronic configuration of nitrogen(N=7) and phosp...

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  20. Name the members of the alkaline earth family

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