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In the modern periodic table, calcium (a...

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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The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2).
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SUBHASH PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-TEXTBOOK EXERCISE QUESTION
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  3. Which elements has two shells, both of which are completely filled w...

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  4. Which elements has The electronic configuration 2,8,2 ?

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  5. Which elements has A total of three shells, with four electrons in i...

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  6. Which elements has A total of two shells, with three electrons in it...

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  7. Which elements has Twice as many electrons in its second shell as in...

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  8. What property do all elements in the same column of the Periodic Table...

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  9. What property do all elements in the same column of the Periodic Table...

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  10. An atom has electronic configuration 2, 8, 7 what is the atomic numb...

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  11. An atom has the electronic configuration 2, 8, 7. a] What is the ato...

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  12. The position of three elements A, B and C in the periodic Table is sho...

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  13. The position of three elements A, B and C in the periodic Table is sho...

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  14. The position of three elements A, B and C in the periodic Table is sho...

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  15. The position of three elements A, B and C in the periodic Table is sho...

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  16. Nitrogen (atomic number 7) and phosphorous (atomic number 15) belong t...

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  17. How does the electronic configuration of an atom related to its positi...

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

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  19. Compare and contrast the arrangement of elements in Mendeleev's period...

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