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- temperature
- A physical property that indicates whether one object can transfer thermal energy to another object.
- termolecular process
- An elementary step in a reaction mechanism; three species collide in such a step.
- ternary compound
- A compound containing three elements.
- tertiary structure
- The manner in which the sheets and helices of the secondary structure of a protein fold on themselves to define the three-dimensional structure; they are held in position by hydrophobic and hydrophilic interactions.
- theoretical yield
- The maximum quantity of a product that could be formed in a chemical reaction if all the limiting reactant reacted to form products (distinguished from actual yield).
- thermal conductivity
- The ability of a substance to transfer heat.
- thermochemistry
- The study of the amount of heat absorbed or released by chemical reactions.
- thermodynamics
- The study of the amount of heat, work, and other energy associated with chemical reactions.
- third law of thermodynamics
- A formal statement that at the absolute zero of temperature the value of the entropy of a perfect crystal is equal to zero.
- Three way safety bulb
- The three way safety bulb is used for pipeting. The attachment is placed over the mouth of the pipet. The air (A) valve is used to empty the bulb of air. The suction (S) valve is used to draw liquid into the pipet. The empty (E) valve is used to drain liquid out of a pipet.
- titration
- The gradual addition of one solution to another until the amount of the reactant being added stoichiometrically matches the amount of the reactant initially present.
- titration curve
- A graphical representation of the amount of a species present (often hydrogen ion) vs. volume of solution added during a titration.
- torr
- A unit of pressure equal to 1 mm Hg or 1/760 atm.
- trans
- Describing the relationship between groups attached to two doubly bonded carbon atoms and located on opposite sides of the double bond. Also referring to groups located across from one another in an octahedral or square planar coordination complex.
- transfer RNA
- The RNA that brings the correct amino acid to a ribosome where it is attached to a growing protein, abbreviated tRNA.
- transition element
- One of the elements in columns 3 through 12 of the periodic table, the area in the periodic table over which the d atomic orbitals are being filled; sometimes the elements in column 12 are not included.
- transition metal
- One of the elements in columns 3 through 12 of the periodic table, the area in the periodic table over which the d atomic orbitals are being filled; sometimes the elements in column 12 are not included.
- transmittance
- Transmittance is a measure of the amount of light which passes through a substance.
- transuranium element
- One of the elements appearing after uranium in the periodic table.
- triglyceride
- A molecule that is an ester of glycerol and three fatty acids.
- trigonal bipyramidal
- A molecular shape having the central atom surrounded by a plane of 3 atoms at the corners of a triangle, one atom above the plane, and one atom below.
- triple bond
- The sharing of three pairs of electrons between bonded atoms to form a strong linkage between the atoms.
- triple point
- The conditions of temperature and pressure at which the solid, liquid, and vapor of a substance are in equilibrium with each other.
- tritium
- The isotope of hydrogen having two neutrons in its nucleus.
- tRNA
- Abbreviation for transfer RNA; the RNA that brings the correct amino acid to a ribosome where it is attached to a growing protein.
- Trouton's rule
- The statement that the entropy of vaporization of a liquid is approximately equal to heat of vaporization of the liquid divided by the boiling point of the liquid (in kelvins).
- tungsten filament lamp
- This lamp is used to generate white light (containing all wavelengths visible to the eye) in spectrophotometers.
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