What are free radicals?

What did the free radicals ever do to you?

I recognize that commercial air ionizers, photocatalytic oxidation (PCO), electrostatic precipitators, ozonizers and other technologies that apply energy (such as UV light or high voltage) can cause reactions in the air and bond breakages that lead to...

In chemotherapy and radiation the goal is to destroy all cancerous cells because they are weaker than normal cells to this treatment. What if there was a way to create/introduce a "super cell" that looked vulnerable to the free radical that...

The explanation goes as following: "As a person ages, he has more free radicals in cells (stand-alone molecules traveling through the cell). Sometimes, free radicals hit the cells DNA and changes the DNA as a result. Most changes in DNA are inconsequential...

I was wondering, if clothing can cause free radicals in the skin or body. The more I read about free radicals and static charge buildup that some people get usually mentioned as an effect of clothing and movement, the more this makes me think that clothing...

H2O2 is known to dissociate into free radicals, which are known to cause cancer, yet it is commonly used, along with carbamide peroxide in tooth-whitening treatments. Why is this? Does it only produce dangerous free radicals in the presence of other...

Are all toxins free radicals? If not please give examples of toxins that are NOT free radicals. Thanks

Does the usage of electrostatic media air filters (polypropylene or polyurethane type, like 3M Filtrete or some reuseable air filters) in an HVAC or air exchanger system cause any meaningful formation of ions or free radicals to the output air (going...

The question is: The reaction between chlorine and methane free radicals can occur in two ways, CH4 + Cl. ------> CH3CL + H. CH4 + Cl. ------> CH3. + HCL (Notice the dots by the way) And the question is to work out the enthalpy of the two equations...