What is the main difference between protons and neutrons ?
Protons have a much smaller mass than neutrons.
Protons have a much larger volume than neutrons.
Protons have an electrical charge, but neutrons have no charge.
Protons make up the nucleus, but neutrons orbit around the nucleus.

protons got positive charge

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