From the given electronic configuration, identify the element which has highest metallic character?
2, 8, 8, 18
2, 8, 8
2, 8, 8, 1
2, 8, 8, 7
Elements having electronic configurations of 2, 8, 8 and 2, 8, 8, 18 are noble gas configurations. Electronic configuration 2, 8, 8, 7 belongs to the halogen group which is more likely to gain one electron to attain noble gas configuration.
Whereas electronic configuration 2, 8, 8, 1 has only 1 electron in its valence shell. It shall readily lose 1 electron to attain noble gas configuration.
Hence option 3 is correct.