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Science Exam Review
Final Exam
Question/Term | Answer/Definition |
---|---|
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. |