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Answer the following questions: There ...

Answer the following questions:
There are some vacant places in the Mendeleev's periodic table. In some of these places the atomic masses are seen to be predicted. Enlist three of these predicted atomic masses along with their group and period.

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NAVNEET PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-EXERCISE
  1. Answer the following questions: Discuss the trends in the variation o...

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  2. Answer the following questions: Name the elements, group , formulae ...

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  3. Answer the following questions: There are some vacant places in the ...

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  4. Answer the following questions: Due to uncertainity in the names of ...

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  5. Chlorine has two isotopes, viz. Cl-35 and Cl-37 Their atomic masses ar...

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  6. How is the problem regarding the position of cobalt("59CO) and nickel ...

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  7. Answer the following questions: How did the position of get fixed t...

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  8. Answer the following questions: Can there be an element with atomic ...

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  9. Answer the following questions: What do you think? Should hydrogen be...

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  10. Answer the following questions: The elements in the second period :Li...

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  11. Answer the following questions: The elements in the third period , n...

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  12. What is the relationship between the electronic configuration of an el...

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  13. The atomic number of beryllium is 4 while that of oxygen is 8. Write d...

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  14. What is the periodic trend in the variation of valency while going fro...

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  15. Answer the following questions: Considering the elements of period 3...

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  16. Answer the following questions: Considering the elements of period 3...

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  17. Answer the following questions: Considering the elements of period 3 ...

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  18. Answer the following questions: What is the periodic trend in the va...

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  19. Classify the elements of the third period into metals and non-metals.

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  20. Answer the following questions: On which side of the period are the m...

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