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An element X placed in 2nd group and 4th...

An element X placed in 2nd group and 4th period of periodic table burns in the presence of oxygen to form a basic oxide
i) Identify the element
ii) Write its electronic configuration
iii) Write a balanced equation for the reaction when this oxide is dissolved in water

Text Solution

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i] The element is calcium
ii] `{:(K, L, M, N),(2,8,8,2):}`
iii]  `2 CaO(s)+H_2O(l) to Ca(OH)_2 (aq)`
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. Lithium is an alkali metal with atomic number = 3 and number of valenc...

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  2. An element X (atomic number 17) reacts with an element Y (atomic numbe...

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  3. An element P (atomic number 20) reacts with an element Q (atomic numbe...

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  4. Arrange giving reason the following elements in the increasing order o...

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  5. The electrons in the atoms of four elements A, B, C, and D are distrib...

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  6. Justify the following statements: a) Cations are smaller in size th...

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  7. Give reasons for the following: a] Metals have a tendency to form ca...

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  8. Given below are some elements of the Modern Periodic Table: ""(4)Be,...

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  9. An element M with electronic configuration (2,8, 2) combines separatel...

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  10. Na, Mg, and Al are the elements of the 3rd period of the Modern Period...

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  11. An element 'X' belongs to the 3rd period and group 16 of the Modern Pe...

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  12. An element A reacts with oxygen to form A2O.  i] State the number of...

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  13. An element has same number of electrons in I and IV shells and in the ...

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  14. i] An element X has both K and L shells completely filled with electro...

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  15. From the part of the periodic table answer the following questions. ...

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  16. An element X placed in 2nd group and 4th period of periodic table burn...

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

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  18. An element X has mass number 35 and number of neutrons = 18. Write ato...

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  19. Observe the given table and question: answer the following {:("Elem...

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  20. The atomic numbers of two elements are 8 and 16 respectively. Write th...

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