Among the following metals,which one has the lowest probable interatomic forces?

All compounds of alkali metals are easily soluble in water,but lithium compounds are more soluble in organic solvents. Explain.

Match the following:

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

The disease known as fluorosis is caused by the reaction of excess fluorine in the body with which of the following?

The element with atomic number $55$ belongs to

Why is $Li_{2}CO_{3}$ decomposed at a lower temperature whereas $Na_{2}CO_{3}$ at higher temperature?