Answer:
On a Plateu on a heating curve phase changes are occuring
Explanation:
The first Phase is melting during which the temrature stays the same while water melts.Other phase changes are freezing sublimation Vaourization condensation and deposition
Answer:
b
Explanation:
orbital overlap electron densities.
I guess you are asking what world should go at the beginning of the sentence. If I am right, it is energy.