Answer :

Electronic configuration:


The atomic number of beryllium = 4


The electronic configuration of 4Be = 2,2


The atomic number of carbon = 6


The electronic configuration of 6C = 2,4


The atomic number of oxygen = 8


The electronic configuration of 8O = 2,6


The atomic number of boron = 5


The electronic configuration of 5B = 2,3


The atomic number of aluminum = 13


The electronic configuration of 13Al = 2,8,3


Among the given elements, Al has the highest electropositive character.


Explanation:


Electropositivity is the tendency of any metal element to become cation (positively charged) by losing its valence electrons.


Electropositivity decreases as we move from left to right in a period.


Electropositivity increases as we move from top to bottom in a group.


Electropositive character is shown by the metals because they have a tendency to lose electrons.


Combining all these facts, Al is the most electropositive element.


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