A shared derived characteristics is usually a homologous structure, such as a backbone, that is shared by all organisms in a group.
C. low boiling points, since convalent bonds are comprise of two non metal elements, the have relatively low boiling points, since most of them are gases.
The correct answer is Be+
That is because it lost a single electron but still has the same number of protons, and thus the effective charge attracting each electron is greater, which in turn makes the radius even smaller
B) A chemical change because the nail reacts with water/oxygen to create rust (a type of oxide)
