Question

Which is the most electropositive element among these ?
4Be,6C,8O,5B,13Al​

Answer 1

Answer:

13Al

as Al has highest atomic number so it is more electropositive.

Answer 2

Electronic configuration of the following elements is:

4Be= 2,2

6C= 2,4

8O= 2,6

5B= 2,3

13Al= 2,8,3

13Al is the most electropositive element among these because 4Be ,6C ,8O ,5B belong to the same period, but 13Al belongs to next period. According to the trend,the electropositive character of an element increase as we move from top to bottom in a group of the periodic table. This happens as the tendency of an atom to lose electrons increases due to a decrease in nuclear charge and increase in the number of shells.

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