BIOS 1120 Chapter Notes - Chapter 2: Unified Atomic Mass Unit, Atomic Nucleus, Hydrogen Bond
Document Summary
Bios 1120 - chapter 2 - atoms, molecules, and life. Lo 3: define isotopes and explain what causes some isotopes to be radioactive and how people may be helped or harmed by radioactivity. Carbon-14: modern medicine makes extensive use of radioactive isotopes ex. Tracing isotopes" movements during physiological processes; helped discover dna is the genetic material of cells: some can release particles with enough energy that they can damage dna, causing mutations. Lo 4: explain how atoms form molecules: electron shells: complex three-dimensional regions around the nucleus that electrons occupy, electrons near the nucleus are more stable than ones in outer shells that have more energy, energy (ex. Ion: an atom that has acquired an overall positive or negative change. Ions with opposite charges attract one another with leads to ionic bonds. Ionic bonds: electrical attraction between positively and negatively charged ions: ex.
