The metal with the highest melting point is aluminium which melts at 660.3°C.
Magnesium melts at 639°C , sodium at 98°C and potassium at 64°C.
The melting point is the temperature at which a substance begins to melt. As a solid substance is heated, or absorbs heat from the environment, the molecules that make up that substance begin to gain more (heat) energy, enough to overcome the intermolecular forces that in the first place have been holding them together in a sort of rigid fashion.
This energy enables the molecules to break free of their intermolecular forces and thus the solid's lattice structure changes and the solid becomes liquid.
Answer:
1) Low Temperature
2) High Pressure
Explanation:
Gases are said to be Ideal when there is no interactions between the molecules. And we know the that the greater the molecules are apart from each other the lesser will be the interactions between them. Hence, high temperature and low pressure results in increasing the distance between molecules and stop them from creating intermolecular interactions.
While, when the temperature is decreased and pressure is increased it forces the molecules to come close to each other and make interactions. Therefore, results in deviating from Ideal behaviour.
2 correct answers: Chemical and neither endothermic or exothermic
