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"The placement of elements in Mendelee...

"The placement of elements in Mendeleev 's periodic table helped in correcting the atomic masses of some elements".Give example to those elements.

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Beryllium , indium and gold .
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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS -THE PERIODIC TABLE -CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION -I)
  1. Who was left the blanks in his periodic table for some undisc...

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  2. Write similar elements to eka-boron , eka aluminum and eka - sill...

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  3. "The placement of elements in Mendeleev 's periodic table helped ...

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  4. Equivalent weight xx valency =

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  5. The anomalous series of elements of mendeleev's periodic table ...

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  6. Name of the 101^(th ) element.

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  7. What is called by the number of postitive charges in an atom ?

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  8. The arrangement of elements elimated the problem of anomalous ser...

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  9. Who classified elements according the their atomic numbers ?

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  10. z' indicates

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  11. Which property of an element is basis in the construction of ...

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  12. How many periods and groups are there in the modern periodic ...

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  13. Match it , {:("1)", "Vertical column ","a)","group"),("2)", "Horio...

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  14. Match it {:("a)s-subshell","1)6 electrons "),("b) p-sunshell ","2) ...

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  15. How many blocks are there in modern peridic table ?

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  16. ""(11)Na :1s ^(2) 2s^(2) 2p ^(6) 3s^(1) this element belongs t...

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  17. ""(21 ) Sc : 1s^(2 ) 2s ^(2) 2p ^(6) 3s^(2)3p ^(6 ) 4s ^(2) 3d^(...

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  18. What is the general outersheell electronic configuration of alkal...

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  19. What is general outershell electronic configuration of Halogen ...

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  20. match the above

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