States of Matter Flashcards
What is a gaseous mixture of electrons and positive ions?
plasma
What is the temperature at which a solid turns to a liquid?
melting point
What device is used to measure atmospheric pressure?
barometer
What is the pressure resulting from the collision of air molecules with objects?
atmospheric pressure
What is the temperature at which the vapor pressure of a liquid is equal to the external pressure?
boiling point
What is the smallest group of particles within a crystal that retains the SHAPE of a crystal?
unit cell
What is a solid in which the atoms, ions or molecules are arranged in an orderly repeating, three dimensional repeating pattern?
crystal
What is the pressure above a liquid in a sealed container, caused by the collision of vaporized particles with the walls of the container?
vapor pressure
What is a form of a solid lacking an orderly internal structure?
amorphous
What is the boiling point of a liquid at a pressure of 101.3 kPa?
normal boiling point
What is the SI unit for pressure?
pascal
What is one of two or more different forms of the same element in the same physical state?
allotrope
What is the conversion of a liquid to a gas below its boiling point?
evaporation
What states that the tiny particles in all forms of matter are in constant motion?
Kinetic theory
What is the change of a substance from a solid to a gas without passing through the liquid state?
sublimation