Correct order of electron affinity for C,Si,a | vedclass

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(B) The electron affinity of elements in a group generally decreases as we move down the group due to an increase in atomic size and shielding effect.

Vedclass · Accepted Answer

$C  Ge$

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(B) The electron affinity of elements in a group generally decreases as we move down the group due to an increase in atomic size and shielding effect. However,for the carbon family (Group $14$),the electron affinity of $Si$ is higher than that of $C$. This is because the $2p$ orbitals in $C$ are very small,leading to significant inter-electronic repulsion,which makes it harder for an incoming electron to be added compared to the larger $3p$ orbitals of $Si$. The general order for Group $14$ is $Si > C > Ge > Sn > Pb$. Therefore,the correct order for $C$,$Si$,and $Ge$ is $Si > C > Ge$,which corresponds to $C  Ge$.

Correct order of electron affinity for $C$,$Si$,and $Ge$ is

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