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Details Title: Physics Description: Chapter 11 Total Flash Cards: 21 Created: 03/25/2006 12:28:25	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Atoms Definition Tiny building blocks made up of mostly empty space, which make up matter. Can combine to form molecules. Term Brownian Motion Definition Perpetual jiggling of particles resulting from collisions between visible particles and invisible atoms. Term Atomic Nucleus Definition Where nearly all the mass of an atom is concentrated. Term Thermonuclear Fusion Reaction Definition When nuclei of 2 or more atoms are squashed into contact. Term Nucleon Definition Principal building block of the nucleus Term Neutron Definition Nucleon in an electrically neutral state. Term Proton Definition Nucleon in an electrically charged state (positively charged). Term Element Definition When a substance is composed of atoms of the same kind. Term Atomic Number Definition Number of protons in an atom. Term Noble Gases Definition Helium,Neon,Argon,Krypton, and Radon. Term Quantum Mechanics Definition The theory of the small-scale world that includes predicted wave properties of matter. Term Isotopes Definition Atoms of the same element that contain different numbers of neutrons. Term Mass Number Definition Used to identify isotopes, The total number of protons and neutrons in the nucleus. Term Atomic Mass Definition The total mass of an atom (sum of the masses of all the atom's components). Term Compound Definition A pure chemical material that consists of more than one kind of atom. Term Mixture Definition A substance that is mixed together with out chemically bonding. Term Molecule Definition Consists of 2 or more atoms held together by the sharing of electrons. Term Chemical Reaction Definition Any process in which atoms rearrange to form different molecules. Term Antimatter Definition Composed of atoms with negative nuclei and positive electrons. Term Positrons Definition Positive electrons. Term Dark Matter Definition Matter we can't see that tugs on stars and galaxies that we can see.