Why elements of 1A and 2A are readily lose their valence electrons?
Answers
Because they are larger as compared to elements of the other group and have low ionisation potential. So they are easily oxidised due to their metallic nature as the valence electrons are somewhat loosely held as compared to those of other elements.
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Both the group IA and IIA elements are weakly electronegative instead of electropositive. Thus their electrons are held more loosely. This is because the protons in the nucleus are screened and lower the effective nuclear charge. When Alkali and alkali earth metals react with halogens to become ionic salts, they will benefit from losing electrons rather than gaining them to fill their octets via the octet rule. Their ionization energies are sufficiently low enough to overcome the barrier of removing their outer electrons.
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