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Write the atomic numbers of two elements...

Write the atomic numbers of two elements X and Y having electronic configuration 2, 8, 2 and 2, 8, 6 respectively.

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Atomic number of `X = 2 + 8 + 2 = 12`, atomic number of `Y = 2 + 8 + 6 = 16.`
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (VERY SHORT ANSWER (VSA) TYPE QUESTIONS)
  1. How do transition elements differ from other elements?

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  2. State the Modern Periodic law. Where are metals and nonmetals found in...

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  3. Write the atomic numbers of two elements X and Y having electronic con...

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  4. Account for the following: Elements of group 17 are monovalent.

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  5. Account for the following: Elements of group 18 are zerovalent.

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  6. Elements A, B, C, and D have atomic numbers 1, 8, 11, and 19 respectiv...

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  7. Out of the two elements X and Y which has a bigger atomic radius? (i...

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  8. Out of the two elements, potassium and sodium, which one can lose elec...

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  9. Mention the type of compounds formed between group 1 and group 17 elem...

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  10. Write the number of vertical columns in the periodic table. What are t...

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  11. Write the number of horizontal rows in the modern periodic table. What...

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  12. Predict the maximum number of valence electrons possible for atoms in ...

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  13. What is the nature of oxides formed by most of p - block elements ?

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  14. Explain the acidic character of oxide of elements down a group and acr...

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  15. Why hydrogen should be placed in group I ?

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  16. Out of Li and K which has strong metallic character?

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  17. List any two properties of the elements belonging to the first group m...

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  18. Write the formula used to determine the maximum numbers of electrons w...

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  19. Name the element and its valency which is having electronic configurat...

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  20. Lithium, sodium and potassium form a Dobereiner's triad. The atomic ma...

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