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State whether the following statement is...

State whether the following statement is true of fals:
On going down in a group of the periodic table, the number of valence electrons increases.

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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Raghav is a student of class X who was trying to convert the groundnut...

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  2. Reshma is the student of class X in a city school. One day she was sit...

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  3. Given alongside is a part of the periodic table: As we move horizont...

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  4. How would the tendency to gain electrons change on moving from left to...

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  5. How would the tendency to lose electrons change as we go from left to ...

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  6. What property do all elements in the same column of the periodic table...

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  7. What property do all the elements in the same group of the periodic ta...

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  8. (a) What is the number of valence electrons in the atoms of first elem...

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  9. State whether the following statement is true of fals: On going down...

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  10. How does the valency of elements vary is going down a group of the per...

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  11. Name the element which is in: (a) first group and third period: (b) ...

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  12. How do electronic configurations of elements change in second period o...

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  13. Arrangement the following elements in increasing order of their atomic...

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  14. Arrange the following elements in the increasing order of their metall...

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  15. Rewrite the folowing statements after correction if necessary: (i) ...

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  16. Fill in the blanks in the following statements: (a) The horizontal r...

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  17. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to...

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  18. (a) How does the size of atoms (atomic size) generally vary in ging fr...

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  19. In the following diagram for the first three periods of the periodic t...

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  20. The elements X,Y and Z belong to groups 2,14 and 16 respectively of th...

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