Four elements A, B, C and D have atomic no. 12,13,14 and 15 respectively. Answer the following questions giving reasons -
1. What is the no. Of valence electrons and valency of D.
2. Which of them will have largest atomic radii.
3. Which of the following will form most basic oxide.

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Answers

  • Brainly User
2016-03-01T13:02:35+05:30
1. valence electron :- 5
valency:- 3 and 5{both}

2. magnesium [atomic no. 12] element A

3. magnesium [atomic no. 12] element A
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plz brainlist it
How magnesium will be the most basic oxide...??
becoz on moving from left to right in period basic chracter decreases
2016-03-01T13:06:31+05:30
ELECTRONIC CONFIGURATION OF ELEMENT A , B, C AND D 
           
            ELEMENT A - 2, 8, 2 
            ELEMENT B - 2, 8, 3
            ELEMENT C - 2 , 8, 4
            ELEMENT D - 2, 8, 5
             
                             1) NO. of valence electron in element D is 5 and valency is 3 
       
                             2) ELEMENT - D will have the largest radii
          
                             3) ELEMENT - C  will form the most basic oxide . 



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