The average kinetic energy and thermal energy decreases, and the temperature decreases as well.
Assuming you meant cation and not action, gallium would most likely form a cation because it is a group A element
If you are asking which is the most abundant, Uranium-238 is
Answer is: (4) emits energy as it moves to a lower energy state.
Atom emits a characteristic set of discrete wavelengths, according to its electronic energy levels.
Emission spectrum of a chemical element is the spectrum of frequencies emitted due to an atom making a transition from a high energy state to a lower energy state.
Each transition has a specific energy difference.
Each element's emission spectrum is unique.
I think that different liquids have different freezing points because every liquid consists of different atoms and different things that make up the atom causing them to have different freezing points.
