Question

2. Why carbon is said to be not a metalloid?​

Answer 1

Answer:

please mark me brainliest

Answer 2

My answer will probably surprise you- Because of wave properties.

That answer relies on a valence bond description - if you think in terms of molecular orbitals, there is no good reason at all because all the electrons are delocalised. It also follows directly from my guidance wave interpretation of quantum mechanics. You will hear that it is to do with electron band levels, but I disagree with that because you can turn non metals into metals and metals into non metals by application of pressure. Thus it has been shown you can convert sodium into a non-metal. What does the pressure do? It alters the way the atoms pack.

If a atoms form bonds, then let the bond be represented by a wave that is bound by the nuclei (i.e. the nuclei determine the nodal properties of the wave and define a wave propagation axis or axes.) Now, let the bond axis go past one of the atoms? What happens next? Eventually it will run into another atom, but how far away is that? The further away, the harder it is for electrons to make a transition and hence the higher the resistance to current flowing. Alternatively, assume the wave has the opportunity to go to the nearest atom, but that is not on the axis of the wave we are considering? The wave can turn corner, BUT to do so it has to be refracted, and it can only do that if it changes velocity. But a change of particle velocity involves a change of energy, so instead of doing that it gets reflected, and the bond is localised. If then bond is localised, it is covalent. Note that electrical conduction is not stopped in graphite, nor for that matter in some organic conductors however, usually the problem is for the waves to “jump” between molecules, and there is a tendency for some reflection, which partially localises waves within molecules. That leads to a resistance, and that resistance can be lowered by doping the solid, thus providing a means for waves to more easily cross to different molecules.

This also requires that, as long as there is no phase change, resistance of metals increases with heat, because the atoms tend to be further away from each other..