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BJU Physical Sci. 2

BJU Physical Science - Ch 2

The fundamental particle of an element. atoms
The rapid phase change from liquid to gas. boiling
A particle with unusual properties that carries a single negative fundamental charge and occupies the spherical volume of space around the nucleus of an atom. electron
The constant random motion of particles in a liquid or a gas. Brownian movement
A change in a material that alters its identity. chemical change
A property that describes how matter will react and change in the presence of other kinds of matter. chemical property
The phase change from gas to liquid. condensation
The phase change from liquid to gas. evaporation
The phase change from liquid to solid. freezing
A nonuniform mixture that contains two or more distinct phases, usually of different kinds of matter. heterogeneous mixture
A uniform mixture of particles of different substances that form a single phase. Also called a solution. homogeneous mixture
The concept that tiny particles in constant, random motion make up all matter. kinetic-molecular theory
The state of matter in which the attractive forces and the disruptive forces are balanced, allowing particles limited movement. liquid
The phase change from solid to liquid. melting
Anything that occupies space and has mass. matter
A nonchemical combination of two or more substances. mixture
Distinct particles formed when two or more atoms bond together. molecule
Used by scientists because many materials can exist in more one physical state. phases
A property that can be observed and measured without changing the kind of matter being studied. physical property
The state of matter in which the attractive forces limit the particles to vibrating in place. solids
The phase change directly from solid to gas or from gas to solid. sublimation
A neutral nuclear particle. neutron
The center of an atom. It contains protons and usually neutrons, which make up nearly all the mass of the atom. nucleus
Any change that does not alter the composition of a substance. physical change
A nuclear particle that carries a single positive fundamental charge. proton
Any process in which particles of a liquid enter the gaseous phase. vaporization
A substance that can flow; a liquid or gas fluid
The process of mixing by particle motion. diffusion
A physical form of matter determined by the arrangement and energy of its particles. The 3 most common are solid, liquid, and gas. state
The state of substance in which its particles are far apart and have large kinetic energies. gas
The change of state of a vapor directly to a solid, bypassing the liquid state. deposition
Created by: heidio