1.

What is the action of alkali metals with oxygen (air) ?

Answer»

Solution :Alkali metals react with oxygen to FORM their oxides.
EX. Lithium forms monoxide
`4 Li + O_(2) overset(Delta)(to) 2Li_(2) O` (Lithium monoxide)
SODIUM forms peroxide
`2Na + O_(2) to Na_(2) O_(2)` (sodium peroxide)
Others metals form super oxides as
`M + O_(2) to MO_(2)` [Where M = K, Rb, Cs)


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