Answer:
A neutral particle made of an electron and hole
Explanation:
Exciton
It is the combination of an electron and a hole ( hole refers to the vacancy of an electron ) . And , as both the electron and the hole have the same charge but the polarity is opposite , the combination will lead to a neutral compound , i.e. , Exciton have no charge and so neutral .
It is free to move in the nonmetallic crystal and since it charge less , it is difficult to detect it directly .
They will melt at the same rate because they contain the same matter
hope this helps and good luck on your project!!!!
False. It is a physical change because the molecules of the bread didn't change only the form of the bread changed.
Answer: True
Explanation: For example, changing direction can change velocity
