What caused the ice cube to melt? What do you think is happening to the particles on the inside of the ice cube as it melts?

Ice melts when heat is provided to it.

Explanation:

When heat is provided, the kinetic energy of the particles increases. The particles start vibrating. As you keep providing heat, the particles start vibrating more strongly and with greater speed. Some particles become so energetic, that they are able to break the force of attraction and move away as a liquid.

Hope this helps.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.