Which of the following has the highest value | vedclass

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(D) Cohesive energy is the energy required to break the metallic bonds holding atoms together in a solid lattice. For alkali metals,the strength of me

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$Na$

Vedclass · Answer

(D) Cohesive energy is the energy required to break the metallic bonds holding atoms together in a solid lattice. For alkali metals,the strength of metallic bonding depends on the number of valence electrons and the size of the atoms. As we move down the group from $Li$ to $Cs$,the atomic size increases,which leads to a decrease in the strength of metallic bonding and consequently a decrease in cohesive energy. Among the given options ($Cs$,$K$,$Rb$,$Na$),$Na$ has the smallest atomic size,resulting in the strongest metallic bonding and the highest cohesive energy. Therefore,$Na$ has the highest value of cohesive energy.

Elements	Ore
$1$. Lithium	$a$. Beryl
$2$. Sodium	$b$. Spodumene
$3$. Beryllium	$c$. Gypsum
$4$. Calcium	$d$. Carnallite

Which of the following has the highest value of cohesive energy?

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Elements Ore

$1$. Lithium $a$. Beryl

$2$. Sodium $b$. Spodumene

$3$. Beryllium $c$. Gypsum

$4$. Calcium $d$. Carnallite

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