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Kala Stevenson
Chapter 8-10 vocabulary
Term | Definition |
---|---|
acid | A compound that produces hydronium ions when dissolved in water. |
indicator | Any substance that changes color in the presence of an acid or base. |
base | A compound that produces hydroxide ions when dissolved in water. |
neutralization | The reaction between an acid and a base. |
salt | During neutralization, the negative ions in an acid combine with the positive ions in a base to produce an ionic compound. |
pH | A measure of its hydronium ion concentration. |
buffer | A solution that is resistant to large changes in pH. |
electrolyte | A substance that ionizes or dissociates into ions when it dissolves in water. |
radioactivity | The process in which an unstable atomic nucleus emits charged particles and energy. |
radioisotope | Any atom containing an unstable nucleus. |
nuclear radiation | Charged particles and energy that are emitted from the nbuclei of radioisotopes. |
alpha particle | A positively charged particle made up of two protons and two neutrons- the same as a helium nucleus. |
beta particle | an electron emmited by and unstable nucleus. |
gamma ray | A pentrating ray of energy emitted by an unstable nucleus. |
background radiation | Nuclear radiation that occurs naturally in the enviroment. |
strong nuclear force | The attractive force that binds protons and neutrons together in the nucleus. |
fission | The splitting of an atomic nucleus into two smaller parts. |
chain reaction | Neutrons released during the splitting of an initial nucleus trigger a series of nuclear fissions. |
critical mass | The smallest possible mass of a fissionable material that can sustain a chain reaction. |
fusion | A process in which the nuclei of two atoms combine to form a lager nucleus. |
plasma | Is a state of matter in which atoms have been stripped of their electrons. |
solute | A substance whose particles are dissolved in a solution. |
solvent | The substance in which the solute dissolves. |
dissociation | The process in which an ionic compound separates into ions as it dissolves. |
dispersion | Breaking into small pieces that spread throughout the water. |
ionization | The process in which neutral molecules gain or lose electrons. |