Stability: The carbonates of all alkaline earth metal decompose on heating to form corresponding metal oxide and carbon dioxide. Looking at the enthalpy change of formation for group 2 metal oxides it’s clearly less energy is needed to break them as you go down the group. The oxides of metals having high positive reduction potentials are not stable towards heat. Transparent heat‐reflective films consisting of ITO–Ag–ITO or ZnO–Ag–ZnO were deposited onto soda‐lime glass by dc magnetron sputtering. Sodium forms peroxides(M2O2) one Oxygen needs one sodium. Introduction. Solubility. 1. MCO 3 —-> MO + CO 2 The temperature of decomposition i.e. In group 1 and 2, the nitrates and carbonates get more stable down the group. Nature of carbonates and bicarbonates: Alkali metal carbonates and bicarbonate stability increases down the group. As the electropositivity increases from top to bottom, the thermal stability of the oxide also increases from top to bottom. The carbonates of alkali metals are stable towards heat. (ii) Carbonates. We have considered data available in the literature on the melting points and thermal stability of transition metal oxides (with different degrees of oxidation) in comparison with the features of the electronic structure of the transition metals and oxygen. All of these carbonates are white solids, and the oxides that are produced are also white solids. Nature of oxide and hydroxide: Alkali metal oxides are basic in nature and their basic character increases gradually on moving down the group. Thermal Stability is the decomposition of a compound on heating. As we move down group 1 and group 2, the thermal stability of nitrate increases. Thermal decomposition is the term given to splitting up a compound by heating it. If "X" represents any one of the elements: The basic character of alkali metal hydroxide LiOH < NaOH < KOH < RbOH < CsOH 18. Nitrates of group -1 and group-2 metals are all soluble in water. solubility: sulphates of alkali metals are soluble in water. 17. 2. However, carbonate of lithium, when heated, decomposes to form lithium oxide. Larger cations stabilize larger anions. 1. The higher the temperature needed to decompose something, the more thermally stable it is. Thermal stability. Sulphates: Thermal stability The sulphates of group-1 and group-2 metals are all thermally stable. So, as the thing goes, Lithium forms oxides(M2O) one oxygen balanced by two lithium atoms. Graphite oxide (GO) is an interesting material because of its excellent solubility in water, unlike graphite , , , , .The high dispersion stability of graphite oxide enables it to form a single graphene oxide layer on any substrate so that it can be applied to numerous devices such as flexible displays, transparent conducting films, and transistors for large area electronics Nitrates of both group 1 and group 2 metals are soluble in water. 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