because the bond enthalpy decreases down the group
As the size of alkali metals increases down the group the M-H bond becomes weaker hence its stability decreases from LiH to CsH
Thermal stability increases down a group because the atomic size increases, leading to weaker intermolecular forces and greater distance between atoms, making it harder for the atoms to come together and react. Additionally, the lower electronegativity of larger atoms down the group makes them less likely to form covalent bonds with other atoms, enhancing their thermal stability.
Melting Point
Down the group the size of atom increases. Hence the force of attraction between the nucleus and the electrons of the next atom decreases. Or in other words, the electronegativity decreases down the group.
The first. Going down metallicity decreases.
As the size of alkali metals increases down the group the M-H bond becomes weaker hence its stability decreases from LiH to CsH
Thermal stability increases down a group because the atomic size increases, leading to weaker intermolecular forces and greater distance between atoms, making it harder for the atoms to come together and react. Additionally, the lower electronegativity of larger atoms down the group makes them less likely to form covalent bonds with other atoms, enhancing their thermal stability.
As we move down a group, electronegativity decreases.
The particles in a substance slow down when the average kinetic energy of the particles decreases. As the average kinetic energy decreases, the internal energy decreases, and so the thermal energy decreases. As the thermal energy of the substance decreases, the temperature decreases.
When chili cools down, its thermal energy decreases as heat is transferred from the chili to its surroundings. The temperature of the chili decreases until it reaches thermal equilibrium with the surrounding environment.
Melting Point
Hydration energy decreases down the group in the periodic table because the size of the ions increases as you move down a group. When ions are larger, they are less strongly attracted to water molecules. Therefore, larger ions exhibit lower hydration energies compared to smaller ions.
because down the group the cation becomes gets larger so the hydration energy decreases. so the solubility decreases
As the beaker cools down, the thermal energy within it decreases. This results in a transfer of heat from the beaker to its surroundings, causing the temperature of the beaker to drop.
It increases
Atomic radius
The size of the group 2 ions gets bigger as we go down the group. Hence, their polarising power also decreases. So, the carbonates are less polarised as we go down the group, requiring more energy to decompose them. Polarising power is the ability of the ion to attract the bonding pair of electrons towards itself.