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Which represents the correct order of first ionisation potential of third period elements?
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a
Na > Mg>Al > Si
b
Na < Mg < At < Si
c
Na < Si
d
Na < Al < Mg < Si
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Correct option is D
Generally, ionisation potential increases, as we move from left to right in a period. However the ionisation Potential of II group elements is higher than that of the III A group elements. This is because of the fully-filled s-orbitals in II group elements.Hence, the correct order of ionisation potential isTalk to our academic expert!
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