Alguien me puede ayudar en la pregunta : ¿Como ha cambiado su composición a través del tiempo y como lo harías utilizando otros materiales?

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

the correct answer to this question is 2