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Account for the following: Elements of g...

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

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Group 17 elements have 7 valence electrons. By gaining one electron, they attain the noble gas configuration. Since valency is defined as the number of electrons required to gain noble gas configuration, valency of group 17 elements is one, i.e., they are monovalent.
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (VERY SHORT ANSWER (VSA) TYPE QUESTIONS)
  1. State the Modern Periodic law. Where are metals and nonmetals found in...

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

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

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

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

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

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

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

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

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

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

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

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

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  14. Why hydrogen should be placed in group I ?

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

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

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

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

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

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  20. What do you mean by valency?

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