Explain why the metals conduct electricity. Write in your own words.
Please don't copy-paste from the internet.

Metals conduct electricity because they have free Electrons in them which helps the current to move eaisily

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the answer is symmetrical : )