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Alkali Metal Oxide
The alkali metals react with oxygen to form several different compounds: suboxides, oxides, peroxides, superoxides, and ozonides. They all react violently with water.
Alkali metal suboxides
Alkali metal oxides
- Lithium oxide (Li2O) is the lightest alkali metal oxide and a white solid. It melts at 1570 °C.
- Sodium oxide (Na2O) is a white solid that melts at 1132 °C and decomposes at 1950 °C. It is a component of glass.
- Potassium oxide (K2O) is a pale yellow solid that decomposes at 350 °C.
- Rubidium oxide (Rb2O) is a yellow solid that melts at 500 °C.
- Caesium oxide (Cs2O) is a yellow-orange solid that melts at 490 °C.
Alkali metal peroxides
Alkali metal superoxides
Alkali metal ozonides
- Lithium ozonide (LiO3) is a red solid which is produced from caesium ozonide via an ion-exchange process.
- Sodium ozonide (NaO3) is a red solid which is produced from caesium ozonide via an ion-exchange process.
- Potassium ozonide (KO3) is a dark red solid which is produced when potassium is burned in ozone or exposed to air for years.
- Rubidium ozonide (RbO3) is a dark red solid which is produced when rubidium is burned in ozone.
- Caesium ozonide (CsO3) is a dark red solid which is produced when caesium is burned in ozone.