In which of the following are the s-block ele | vedclass

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(C) The melting points of $s$-block elements depend on the strength of metallic bonding and crystal structure. $Be$ (Beryllium) has a high melting poi

Vedclass · Accepted Answer

$Be > Mg > Li > Na$

Vedclass · Answer

(C) The melting points of $s$-block elements depend on the strength of metallic bonding and crystal structure. $Be$ (Beryllium) has a high melting point $(1560 \ K)$ due to its small size and strong metallic bonding. $Mg$ (Magnesium) has a melting point of $923 \ K$. $Li$ (Lithium) has a melting point of $453 \ K$. $Na$ (Sodium) has a melting point of $371 \ K$. Comparing these values: $1560 \ K (Be) > 923 \ K (Mg) > 453 \ K (Li) > 371 \ K (Na)$. Thus, the correct order is $Be > Mg > Li > Na$.

column-$I$	column-$II$
$a$. $Ra$	$p$. Aeroplane industry
$b$. $K$	$q$. Down cell
$c$. $Li$	$r$. Photo electric cell
$d$. $Na$	$s$. Radioactive

In which of the following are the $s$-block elements arranged in the correct order of their melting points?

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Match column-$I$ with column-$II$ :

column-$I$ column-$II$

$a$. $Ra$ $p$. Aeroplane industry

$b$. $K$ $q$. Down cell

$c$. $Li$ $r$. Photo electric cell

$d$. $Na$ $s$. Radioactive

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