# Shared Flashcard Set

## Details

Energy & Structure of Matter
Test Study Guide
14
Physics
03/21/2008

Term
 MATTER
Definition
 Anything that has mass or takes up space.
Term
 What is an atom & what is it made up of
Definition
 Atom-Anything that can be touched physically. Made up of 3 tiny particles-subatomics:  protons, neutrons, electrons.
Term
 WHICH PARTICLES ARE IN THE NUCLEUS?
Definition
 PROTONS & NEUTRONS. PROTONS-POSITIVE ENERGY NEUTRONS-NEGATIVE ENERGY
Term
 WHICH PHASE OF MATTER HAS THE MOST INTERNAL ENERGY?  WHY?  WHICH PHASE HAS THE LEAST INTERNAL ENERGY?
Definition
 Plasma has the most energy because of the number of charged particles. Solids have the least energy because particles can't move, are stationary.
Term
 WHAT IS AN ATOM MADE UP OF MOSTLY.
Definition
 Space
Term
 WHAT BEHAVIORS DOES AN ELECTRON SHOW?
Definition
 The main thing to remember is the electron behaves like a wave until its position is measured and the wave function collapses.
Term
 HOW DO WE MEASURE ENERGY?
Definition
Term
 WHERE DO WE FIND THE ENERGY IN MATTER?
Definition
Term
Definition
 Radioactivity is the process whereby unstable atomic nuclei release energetic subatomic particles.
Term
 WHAT TYPE OF REACTION IS A NUCLEAR POWER PLANT?
Definition
 A nuclear power plant uses controlled nuclear fission
Term
 HOW IS HEAT A TYPE OF KINETIC ENERGY
Definition
 Heat is simply a form of kinetic energy, the total kinetic energy of random motion of all the atoms in an object.
Term
 WHAT IS HALF-LIFE?
Definition
 The amount of time it takes for half of a substance or entity to undergo some specified process.
Term
 HOW DO YOU CALCULATE THE ENERGY IN A NUCLEAR REACTION?
Definition
 ΔE = Δmc2 where ΔE is the change in energy, Δm is the change in mass (mass of products - mass of reactants), and c is the speed of light (3.00 x 108 m/s).
Term
 WHAT IS AN ISOTOPE?
Definition
 An isotope is a variant on a basic element, a substance made of atoms with a different number of neutrons than is typical.
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