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The atomic number of beryllium is 4 whil...

The atomic number of beryllium is 4 while that of oxygen is 8. Write down the electronic configuration of the two and deduce their valency from the same.

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TARGET PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -Apply your knowledge
  1. Deduce the maximum electron capacity of the shells K, L and M?

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

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

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  4. The table on Textbook page no. 25 is made on the basis of the modern p...

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

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  6. What is the periodic trend in the variation of valency while going dow...

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  7. By referring to the modern periodic table, find out the periods to whi...

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  8. State the period to which the above elements belong.

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  9. Arrange the above elements in a decreasing order of their atomic radii...

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  10. Does this arrangement match with the pattern of the second period of t...

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  11. Why this arrangement of elements is similar to the above period of the...

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  12. Which of the above elements have the biggest and the smallest atom?

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  13. By referring to the modern periodic table, find out the group to which...

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  14. Arrange the above elements vertically downwards in an increasing order...

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  15. Does this arrangement match with the pattern of the group 1 of the mod...

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  16. Which of the above elements have the biggest and the smallest atom?

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  17. What is the periodic trend observed in the variation of atomic radii d...

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

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  19. On which side of the period did you find the Non-metals?

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  20. On which side of the period did you find the Non-metals?

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