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From the following elements: ""4Be, "...

From the following elements:
`""_4Be, ""_9F, ""_19K, ""_20Ca`
(i) Select the element having one electron in the outermost shell.
(ii) Two elements of the same group. Write the formula and mention the nature the compound formed by the union of 19K and element X (2,8, 7).

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Ionic or electrovalent bond is formed.
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VK GLOBAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -SHORT ANSWER QUESTIONS-II
  1. Write the main aim of classifying elements. Name the basic property of...

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  2. How many groups and periods are there in the Modern Periodic Table? Ho...

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  3. From the following elements: ""4Be, ""9F, ""19K, ""20Ca (i) ...

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  4. Name any two elements of group one and write their electronic configur...

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  5. Write the number of periods the Modern Periodic Table has. State the c...

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  6. The elements ""4Be, ""12Mg and ""20Ca , each having two valence electr...

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  7. Given below are some elements of the Modern Periodic Table. Atomic num...

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  8. Nitrogen (atomic no. 7) and phosphorous (atomic no. 15) belong to grou...

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  9. Na, Mg and Al are the elements having one, two and three valence elect...

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  10. Two elements 'P' and 'Q' belong to the same period of the modern perio...

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

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  12. Identify, the elements with the following property and arrange them in...

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  13. Properties of the elements are given below. Where would you locate the...

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  14. The atomic number of an element “X' is 20. (i) Determine the posi...

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  15. The following table shows the position of six elements A, B, C, D, E a...

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  16. The atomic radii of first group elements of the Periodic Table are as ...

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  17. The elements of the second period of the Periodic Table are given belo...

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  18. The atomic numbers of nitrogen, oxygen and fluorine are 7, 8 and 9 res...

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  19. Four elements P, Q, R and S belong to the third period of the Modern P...

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  20. Consider the following elements: Li, Cl, Br, Na, K, I (i) Arran...

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