Answer:
yo try and search it on Google
b
Explanation:
b/c proton + neutron=mass number and
mass number - proton= neutron
You will be able to watch the slow dissolution of the nail (probably a steel nail and not iron) and the change in colour of the solution.
I believe not 100% sure.
i believe the answer is supersaturated
The correct answer attached in file, Thank you for joining brainly community.
