The elements which tend to achieve a two-electron configuration in the valence shell:
(a) Hydrogen
(b) Lithium
(c) Beryllium
(d) All of these
Answer (2)
Beryllium is the element that tends to achieve a two-electron configuration in its valence shell, while hydrogen and lithium do not specifically aim for this. Beryllium's stable state involves having two valence electrons, either by losing them or forming bonds. Thus, option (c) is correct. ;
Beryllium tends to achieve a two-electron configuration in its valence shell, while hydrogen and lithium do not aim for this. Hydrogen seeks a stable configuration through gaining one electron, and lithium loses one electron for stability. Therefore, the correct answer is (c) Beryllium.
;
