They emit radiation. Which can be very harmful to living things, as well as some non living things. I hope i answered you question :)
Something you wear like a shirt you put on to go outside with
Yes, I am happy to help you, but if you know that just asking this, people earn points practically free.
The extent of dissociation into hydrogen ions in water. A strong acid dissociates completely into hydrogen ions in water whereas a weak acid only dissociates partially
