Why does the thermal stability of alkaline earth metal carbonates increase down the group?

-As the size of alkaline earth metal ions increases across the group, the effect of ions on carbonate ions decreases. -On heating alkaline earth metal carbonates undergo thermal decomposition to form a metal oxide and carbon dioxide. -More heat supplied, carbonates become more thermally stable.

What is the difference between alkali and alkaline earth?

The difference between alkali and alkaline is that alkali is the group 1 metal of the periodic table such as potassium, lithium, sodium, rubidium, caesium, whereas the Alkaline earth metal is the group 2 of the periodic table with elements such as beryllium, barium, hydrogen, strontium, magnesium, radium, calcium, etc.

How do carbonates compare to thermal stability?

Thermal decomposition of the Group 2 carbonates and nitrates. This page looks at the effect of heat on the carbonates and nitrates of the Group 2 elements – beryllium, magnesium, calcium, strontium and barium. It describes and explains how the thermal stability of the compounds changes as you go down the Group.

What is thermal stability of alkaline earth metal?

As we move down the group alkaline earth metal carbonates require more heating to decompose, so carbonates become more thermally stable down the group.

Why are alkaline earth metals more stable than alkali metals?

All alkaline Earth metals have similar properties because they all have two valence electrons. They readily give up their two valence electrons to achieve a full outer energy level, which is the most stable arrangement of electrons.

Which of the following alkali carbonates will have high thermal stability?

As the electropositive character increase down the group, the stability of alkali carbonates increases. Hence more thermal energy required for the decomposition of alkali carbonates down the group. Hence, Rb2CO3 have more thermal stability than others.

What are 2 differences between the alkali metals and the alkali earth metals?

The key difference between alkali metals and alkaline earth metals is that all alkali metals have an electron in their outermost shell whereas all the alkaline earth metals have two outer electrons. The elements in these two groups are the most reactive metals in the periodic table.

What is difference between alkali metals and alkaline metals?

All the elements on earth can be categorized into metals, non-metals, metalloids and inert gasses. The main difference between alkali metals and alkaline earth metals is that alkali metals have one valence electron in the outermost orbit whereas alkaline earth metals have two valence electrons in the outermost orbit.

Why does thermal stability of carbonates increase down Group 2?

The thermal stability increases as you go down Group 2. This is because the Group 2 ion has lower charge density, and thus distorts the carbonate ion less. The less distorted the carbonate ion is, the more stable it is, and so a higher temperature is required to decompose the carbonate.

What is the thermal stability of carbonates of 2nd A group elements?

All these carbonates decompose on heating to given CO2 and metal oxide. The thermal stability of these carbonates increases down the group i.e., from Be to Ba. BeCO3 is unstable to the extent that it is stable only in atmosphere of CO2.

What is the stability of alkaline earth metal carbonates?

Alkaline earth metal carbonates have less stability towards heat and decompose to carbon dioxide. On moving down the group, the stability of alkaline earth metal carbonates increases. Because of diagonal relationship, lithium carbonate decomposes similar to magnesium carbonate.

What are the solubility and thermal stability of alkali metals?

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates, (b) Carbonates, (c) Sulphates. Nitrates, carbonates and sulphates of alkali metals are water soluble. On moving down the group, the solubility increases.

Are carbonates thermally stable down the Group 2?

Both carbonates and nitrates of Group 2 elements become more thermally stable down the group. The larger compounds further down require more heat than the lighter compounds in order to decompose. All the carbonates in this group undergo thermal decomposition to the metal oxide and carbon dioxide gas. Full answer is here.

What is the difference between alkaline earth metals and oxides?

The oxides of alkaline earth metals are basic but less basic in comparison to alkali metals. Hydroxides of alkaline earth metals are basic in nature except for beryllium hydroxide. Alkali earth metals form solid carbonates. As one moves from beryllium to barium thermal stability of carbonates usually increases.