Answer:
When atoms approach one another closely, the electron clouds interact with each other and with the nuclei. If this interaction is such that the total energy of the system is lowered, then the atoms bond together to form a molecule.
Explanation:
1s2 2s2 2p6 3s2 3p6 3d6 4s2
I can't see the question
the particles start to spread out and cause it to get warmer
2 moles
