The electrons in the outermost shell of the covalent compounds are shared by nearby atoms. As there are no free electrons for conducting electricity, the covalent compounds are perfect insulators at absolute zero. As the temperature increases, some electrons move from valence band to conduction band. This gives rise to conductivity. But as the numbers of charge carriers are very low, covalent compounds are poor conductors. On the other hand metals are good conductors cause of their bonding. Metallic bonding consists of a sea of electrons rather than discreet bonds. The free electrons are able to move freely. Since electricity and heat need electrons to move, the bonding promotes conductivity.
Answer: D volcanic eruption
Answer:
Carries food from the mouth to the stomach.
Explanation:
The esophagus is the tube in which chewed food travels after you swallow. It is directly connected to the mouth and the stomach.
The one with the the limestone thingy is faster because the friction is loss
my educational guess
Answer: There is a teacup orbiting the Milky Way galaxy.
Explanation: Hello!
To find the correct answer, you need to find a hypothesis that cannot be proven wrong. All but one can indeed be proven wrong. The correct answer is there is a teacup orbiting the Milky Way galaxy because there is no way anyone can tell if there is a teacup orbiting the Milky Way galaxy or not. We know that it can be proven wrong because there is no life on Mars, the human species started in Africa and that humans cannot live without a certain amino acid. The only thing that really can’t be proven wrong is the one about a teacup.
