Question
State the characteristics of $s-$block elements.
✓
Answer
The $s-$block contains the elements of group $1 ($alkali metals$)$ and group $2 ($alkaline earth metals$).$
They occur in nature only in combined state as they are reactive elements.
Except $Li$ and $Be,$ compounds formed by all other $s-$block elements are predominantly ionic in nature.
This is because they have only one or two valence electrons which they can lose readily forming $M^+ \ or \ M^{2+}$ ions.
Since they can lose electrons easily, they have low ionization enthalpies, which decreases down the group resulting in increased reactivity.
They occur in nature only in combined state as they are reactive elements.
Except $Li$ and $Be,$ compounds formed by all other $s-$block elements are predominantly ionic in nature.
This is because they have only one or two valence electrons which they can lose readily forming $M^+ \ or \ M^{2+}$ ions.
Since they can lose electrons easily, they have low ionization enthalpies, which decreases down the group resulting in increased reactivity.
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