Answer:
Common characteristics of
alkali metals:
(i) Same electronic
configuration, [inert gas]\[n{{s}^{1}}\].
(ii) Never
found free in nature but always in combined state.
(iii) Always
show +1 oxidation state.
(iv) With
the exception of some compounds of lithium, the salts are ionic in nature. They
are colourless, soluble in water. The solutions are good conductors of
electricity.
(v) Impart
characteristic colour to flame.
(vi) Metals
are paramagnetic but salts are diamagnetic.
(vii) All
are readily affected by air.
(viii) All
decompose water.
(ix) Strong
affinity for non-metals.
(x) Dissolve in
liquid ammonia and produce blue coloured solutions.
(xi) The metals are obtained by electrolysis of a fused salts,
usually the fused halides.
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