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Na, Mg and Al are the elements having on...

Na, Mg and Al are the elements having one, two and three valence electrons respectively. Which of these elements (i) has the largest atomic radius, (ii) is least reactive ? Justify your answer stating reason for each.

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(i) Na has the largest atomic size because the atomic size decreases from left to right due to the increase in the nuclear charge.
(ii) Al is least reactive because the tendency to lose electrons decreases from left to right.
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VK GLOBAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -SHORT ANSWER QUESTIONS-II
  1. Write the number of periods the Modern Periodic Table has. State the c...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  17. Atomic number is considered to be a more appropriate parameter than at...

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  18. Two elements with symbol X (atomic no. 16) and Y (atomic no. 12) are p...

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  19. Taking the example of an element of atomic number 16, explain how the ...

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  20. Calcium is an element with atomic number 20. Stating reason answer eac...

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