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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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Th elements with atmic number 12 has same chemical properties as that of calcium. This is because have same number of valence electrons(2).
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NCERT-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
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  2. Besides gallium, which other elements have since been discovered that ...

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  3. What were the criteria used by Mendeléev in creating his Periodic Tabl...

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  4. Why do you think the noble gases are placed in a separate group?

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  5. How could the Modern Periodic Table remove various anomalies of Mendel...

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  6. Name two elements you would expect to show chemical reactions similar ...

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  7. Name (a) three elements that have a single electron in their outermo...

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  8. (a) Lithium, sodium, potassium are all metals that react with water to...

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  9. In the Modern Periodic Table, which are the metals among the first ten...

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  10. By considering their position in the Periodic Table, which one of the ...

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  11. Which of the following statements is not a correct statement about the...

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  12. Element X forms a chloride with the formula XCl(2), which is a solid w...

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  13. Which element has (a) two shells, both of which are completely filled...

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  14. (a) What property do all elements in the same column of the Periodic T...

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  15. An atom has electronic configuration 2, 8, 7. (a) What is the atomic n...

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  16. The position of three elements A, B and C in the Periodic Table are sh...

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

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

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  19. In the Modern Periodic Table, calcium (atomic number 20) is surrounded...

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

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