The s-Block Elements
Group 1 elements: lithium, sodium, potassium, rubidium, caesium, and francium
- Called alkali metals because their hydroxides are alkaline in nature
General outer electronic configuration is ns1.
Silvery white, soft, and light metals
Density increases down the group. (exception: Na is denser than K)
Low melting and boiling points − Reason: weak metallic bond due to the presence of only one electron in the outermost shell
Alkali metals form oxides on combustion.
The stability of peroxides or superoxides increases on moving down the group (i.e…
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