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In the modern periodic table calcium (at...

In the modern periodic table calcium (atomic number 20) is surrounded by elements with atomic numbers 12,19,21 and 38. Which of these physical and chemical properties resembling calcium?

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In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?

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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to...

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  2. How does the electronic configuration of an atom relate to its positio...

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  3. In the modern periodic table calcium (atomic number 20) is surrounded ...

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  4. Compare and contrast the arrangement of elements in Mendeléev’s Period...

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  5. Rahul is a ten year old boy. He had purchased a packet of potato chips...

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  6. Mr. Kumar runs a small garment making factory in a premises having a r...

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  7. Raghav is a student of class X who was trying to convert the groundnut...

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

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

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

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

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

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

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

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

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

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

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

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

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

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