Gas and liquid are two different states of matter. In these states, particles move more freely than in a solid-state. Due to this characteristic, in both liquids and gases, there is not a defined shape; instead, liquids and gases adapt to the container or space where they are, although gases occupy all the space in a container. Besides this, they differ because gases do not have a defined volume as this can change through compression, while liquids have a defined volume. Thus, one similarity between gases and liquids is that they do not have a defined shape (option B).
Answer:“If we’ve covered all of the potential sources, and we know the unique signature of the sand from these different sources, and we find it on a beach somewhere, then we basically know where it came from,” explained Barnard.
The correct answer is option B. Where are the regions of electron density?
In the quantum mechanical model of the atom the exact location of an electron is unknown. But there is a probability of finding an electron in a given space. So in quantum mechanics instead of an electron we always refer to electron density, which is simply the probability of finding an electron in space.
