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In mendeleev's perodic table, why was th...

In mendeleev's perodic table, why was there no mention of noble gases like helium, neon and argon?

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MBD-PERIODIC CLASSIFICATION OF ELKHOENTS-EXAMPLE
  1. What were the two criteria used by mendeleev in creating his periodic ...

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  2. Why did mendeleev leave some gaps in his periodic table?

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  3. In mendeleev's perodic table, why was there no mention of noble gases ...

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  4. Would you place the two isotopes of chlorine CI-35 and CI-37 because o...

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  5. How did mendeleev's periodic table help in the discovery of new elemen...

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  6. Discuss some major merits of the Mendeleev's periodic table

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  7. Point out the major defects in the mendeleev's periodic table?

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  8. Give a brief description of long form of periodic table?

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  9. What is periodicity? What is the cause of periodicity?

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  10. What were the two major shortcomings of meneleev's periodic table? How...

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  11. Two elements X and Y have atomic numbers 12 and 16 respectively. Write...

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  12. Why is long form of periodic table regarded better than mendeleev's?pe...

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  13. How could modern periodic table remove various anomallies of mendeleev...

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  14. The following tables shows the position of six elements A, B, C, D, E ...

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  15. The following tables shows the position of six elements A, B, C, D, E ...

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  16. The following tables shows the position of six elements A, B, C, D, E ...

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  17. The following tables shows the position of six elements A, B, C, D, E ...

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  18. The following tables shows the position of six elements A, B, C, D, E ...

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  19. The question refers to the elements of the periotic table with atomic ...

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  20. An element belongs to 3rd period and 17th group of periodic table.Find...

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