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Science Exam Review

Final Exam

Compound Substance in which atoms of two or more elements are combined in a fixed proportion.
Distillation Separating substances by evaporating a liquid and recondensing vapor.
Solution Homogeneous mixture of particles that will never settle to the bottom.
Suspension Heterogeneous mixture containing a liquid in which visible particles settle.
Specific Heat Used to identify an unknown substance.
Diffusion Spreading of particles until even throughout.
Kinetic Theory Matter is composed of small particles, which are in constant motion, and collide with each other and walls.
Plasma Matter consisting of positive and negative particles.
Thermal Expansion Increase in size when temperature increases.
Viscosity Resistance of a fluid to flow.
Isotope Atoms of same elements but different numbers of neutrons.
Quark Smaller particles in atoms.
Critical Mass Amount of material needed to produce one more fission reaction.
Strong Force Force that attracts protons and neutrons.
Transmutation Changing one element into another using radioactivity.
Sun's Energy Nuclear Fusion.
Allotrope Same elements, different molecular structure.
Diatomic Molecule Two atoms of same elements in covalent bonds.
Metallic Bonding Positively charged metallic ions are surrounded by electrons.
Radioactive Element Nucleus breaks down and gives off particles and energy.
Transition Elements Groups 3-12.
Transuranium Element Elements with more than 92 protons.
Molecule Comes from covalent bonding.
Polyatomic Ion Positively or negatively charged group of atoms.
Catalyst Speeds up reactions.
Inhibitor Slows down reactions.
Precipitate Insoluble compound formed from double-displacement reactions.
Dissociation Ionic solid separates into its positive and negative ions.
Saturated Solution Can hold all of the solute.
Solute Substance being dissolved.
Solvent Substance doing the dissolving.
Supersaturated Solution More solute than a saturated solution at same temperature.
Unsaturated Solution Can dissolve more solute at a given temperature.
Acid Substance that produces hydrogen ions in solution.
Base Substance that produces hydroxide ions in solution.
Buffer Solution that react to additional acids and bases to lower effects.
Hydronium Ion Hydrogen ion plus water, comes from dissolving acids into water.
Indicator Organic compound that changes color in acids and bases.
Neutralization Reaction between an acid and base.
Salt Negative ions of base combing with positive ions of acid.
Soap Organic salts.
Titration Solution of known concentration is used to find concentration of another.
Created by: Destroy