Answer:
Phosphorus has a low melting point because the intramolecular forces holding it together is London Dispersion Forces.
Explanation:
London Dispersion Forces (LDF) are the weakest intramolecular forces. You don't need to break the covalent bonds, but rather the Van Der Waals' Forces. If LDF are the weakest forces, then the melting point is low.
Answer:
Your answer will be b(molten material from the outer core makes its way to the surface of earth)
Explanation:
There are three variables independent, dependent ,and controlled
No doubt it's B. solid, liquid, and gas.
Hope this helps!