Why does a solid turn into a liquid when heat is added?

At element makes up all organic compounds?

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?

How did albert einstein explain the photoelectric effect? a) light is made up of electrons b) light is made up of atoms c) light is made up of electricity d) light is made up of photons