Answer: from a gas to a liquid
Explanation:
I passed the test
Physical. No change in molecules. It goes from hard to liquid.
Answer:
n = 2 to n = 1
Explanation:
The electrons in the closest orbitals to the atomic nucleus experience the strongest attraction. Therefore, for an electron to jump up from the ground state to n = 2 a lot of energy is required to overcome the attractive force of the nucleus (also means this energy will be dispensed when the electron jumps down). The energy required to jump up to other energy levels decreases as these orbitals are shielded from the attractive force of the nucleus.