The magnitude of London forces is proportional to the mass of the molecules, so as the molecular weights of the halides increase down the group, more energy is ...

Due to the size of the atoms increasing, the strength of the metallic bonds between atoms of the element decreases going down the group. This is because the sea ...

The reactivity increases down the group from Mg to Ba. This is because the further away an electron is from the nucleus, the weaker its attraction. Не найдено: point | Нужно включить: point

This weaker bond means less energy is require to melt the alkali metals. Hence lowering the melting point.

As you go across the period, the atomic radii decreases. This is due to an increased positive charge of the nucleus (increased electronegativity) pulling the ...

Melting point decreases going from lithium to sodium because sodium is lower down group one therefore it has a greater number of shells.

Metals have good thermal and electrical conductivity as a result of the delocalised electrons.

As we go down from HCl to HI, the halide element becomes less electronegative. This means the bond become less polarised and the permanent dipole permanent ...

Magnesium has a higher melting point because magnesium ions are Mg 2+ and sodium is Na + . Magnesium ions have a stronger positive charge.

This means that the van der waal forces are stronger down the group therefore they require more energy to overcome. The more energy that is required to overcome ...