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.

Why does the stability of carbonates increase down the group?

All the carbonates in this group undergo thermal decomposition to the metal oxide and carbon dioxide gas. Down the group, the carbonates require more heating to decompose. The carbonates become more thermally stable down the group.

Why does the thermal stability decreases down the group?

This is due to the fact size of atom increases down the group which leads to weaker interaction between atoms and its hydride leading to decrease in stability down the group. Atomic size increases, lattice energy decreases, hence stability decreases.

Does thermal stability decrease down the group?

Thermal stability of hydrides of first group elements follows the order- They become less stable and hence thermal stability decreases down the group.

Why carbonates of Group 1a elements are more thermally stable than those of group 2a?

Polarizing the carbonate ion The positive ion attracts the delocalized electrons in the carbonate ion towards itself. If the positive ion only has one positive charge, the polarizing effect is lessened. This is why the Group 1 compounds are more thermally stable than those in Group 2.

Why does BeO have higher thermal stability?

The oxides are very stable due to high lattice energy and are used as refractory material. The oxides of the alkaline earth metals (except BeO and MgO) dissolve in water to form basic hydroxides and evolve a large amount of heat. BeO and MgO possess high lattice energy and thus are insoluble in water.

Why does the thermal stability of alkali 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.

Why carbonates of group 1a elements are more thermally stable than those of group 2a?

That is why the Group 1 compounds are more thermally stable than those in Group 2. You have to heat the Group 1 compound more because the carbonate ions are less polarised by singly charged positive ions. In other words, as you go down the Group, the carbonates become more thermally stable.

Why does thermal stability decrease down Group 15?

The electron density on the central atom decreases with the increase in the size of the central atom. Hence its ability to donate a pair of electrons decreases thus reducing the basic character. So, as the size of the central atom increases, the stability decreases. Thus the thermal stability decreases down the group.

Why does thermal stability decrease down group 17?

Since H-X bond is more easily broken down the group, thermal stability of the halogen halide decreases.

Does stability increase down a group?

For carbonates and bicarbonates, I know that stability increases down the group, and for chlorides and fluorides, stability decreases down the group.

Which carbonates are stable heat?

Explanation: Barium carbonate is thermally the most stable. On moving down the group, the electropositive character of alkaline earth metals increases. Due to this, their thermal stability also increases.