Glossary of Chemistry Terms - T

T

• talc - a mineral representing the one on the Mohs Scale and composed of hydrated magnesium silicate with the chemical formula H₂Mg₃(SiO₃)₄ or Mg₃Si₄O₁₀(OH)₂
• temperature - the average energy of microscopic motions of particles
• theoretical yield - see yield
• theory - a model describing the nature of a phenomenon
• thermal conductivity - a property of a material to conduct heat (often noted as )
• thermochemistry - the study of absorption/release of heat within a chemical reaction
• thermodynamics - the study of the effects of changing temperature, volume or pressure (or work, heat, and energy) on a macroscopic scale
• thermodynamic stability - when a system is in its lowest energy state with its environment (equilibrium)
• thermometer - device that measures the average energy of a system
• titration - the process of titrating one solution with another, also called volumetric analysis
• torr - a unit to measure pressure (1 Torr is equivalent to 133.322 Pa or 1.3158×10−3 atm)
• transition metal - elements that have incomplete d sub-shells, but also may be referred to as the d-block elements
• transuranic element - element with atomic number greater than 92; none of the transuranic elements are stable
• triple bond - the sharing of three pairs of electrons within a covalent bond (example N₂)
• triple point - the place where temperature and pressure of three phases are the same (Water has a special phase diagram)
• Tyndall effect - the effect of light scattering by colloidal (mixture where one substance is dispersed evenly through another) or suspended particles