BIOL 1001 Chapter : Chapter 2 Continue
Document Summary
How do atoms interact to form molecules? (cid:131) free radicals are implicated in heart disease, Alzheimer"s, cancer, and aging (cid:131) antioxidants like vitamins c and e render free radicals harmless (cid:131) some cellular reactions produce free radicals. A free radical is a molecule in which atoms have 1 or more unpaired electrons in their outer shells (cid:131) free radicals are highly unstable and reactive. Free radicals steal electrons, destroying other molecules. Cell death can occur from free radical attack. How do atoms interact to form molecules? (cid:131) chemical bonds hold atoms together within (cid:131) ionic bonds form among charged atoms that are called molecules. A chemical reaction is a process by which new chemical bonds are formed or existing bonds are broken, converting one substance into another ions. Electrons are transferred from one atom"s electron shell to another"s. (cid:131) covalent bonds form between uncharged atoms that (cid:131) covalent bonds form between uncharged atoms that share electrons.
