Which element would release the most energy while adding an electron to a neutral atom in the gas phase?
A. Na
B. Al
C. Br
Answer (2)
Bromine (Br) has the highest electron affinity among the elements considered, releasing approximately -324 kJ/mol of energy when it gains an electron. In contrast, Sodium (Na) and Aluminum (Al) have much lower electron affinities, indicating they release far less energy in this process. Thus, adding an electron to a neutral atom of Br would yield the most energy release. ;
Bromine (Br) releases the most energy when gaining an electron, with an electron affinity of about -324 kJ/mol. Sodium (Na) and Aluminum (Al) have lower electron affinities of -52.6 kJ/mol and -41 kJ/mol respectively. Thus, the choice is Bromine (Br).
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