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F
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- f block
- The lanthanides and actinides, elements in which the f atomic orbitals are being filled.
- face-centered cubic
- A lattice structure having atoms in the center of each face and at each corner of a cube, abbreviated fcc.
- Fahrenheit
- The temperature scale defined by the values 32 °F for the freezing point of water and 212 °F for the boiling point of water.
- family
- Those elements that comprise a single column of the periodic table.
- Faraday
- The charge associated with a mole of electrons, 96,485 C/mol.
- Faraday constant
- The electric charge carried by one mole of electrons, 9.648 670 x 104 C mol-1; abbreviated F.
- Faraday's law
- The proportionality between the number of moles of a substance produced or consumed in an electrochemical cell and the amount of electricity that passes through the electrical circuit of the cell.
- fat
- A molecule that is an ester of glycerol and three fatty acids.
- fatty acid
- A long-chain carboxylic acid that is a component of the triglycerides which constitute fat.
- fcc
- Abbreviation for face-centered cubic; a lattice structure having atoms in the center of each face and at each corner of a cube.
- ferromagnetic
- Able to acquire a permanent magnetization.
- filtration
- The process of separating a solid from a liquid by permitting the liquid to pass through a filter.
- first law of thermodynamics
- A formal statement of the conservation of energy as applied to chemical systems; the change in internal energy is equal to the sum of the heat added to a system plus the work done to the system.
- first-order reaction
- A reaction for which the rate is directly proportional to the concentration of one reactant.
- fission
- A nuclear reaction in which large nuclei break apart to form smaller ones.
- formal charge
- A quantity useful for predicting reactivity patterns of molecules. Its value is found by dividing bonding electrons equally between bonded atoms and calculating the resulting charge on each atom.
- formation constant
- An equilibrium constant for a reaction in which a product of interest is formed; often applied to the formation of a complex ion from the central metal ion and ligands.
- formula weight
- The mass of one mole of a formula unit of a substance; molar mass.
- free energy
- A thermodynamic function corresponding to the tendency for spontaneous change in a system; represented by the symbol G.
- freezing
- The process of forming a solid from a liquid.
- freezing point
- The temperature at which a liquid becomes a solid; also called melting point.
- freezing point depression
- The decrease in the freezing point of a liquid as a result of the presence of a solute.
- frequency
- The rate at which a periodic event occurs; specifically, the rate at which the waves of electromagnetic radiation pass a point.
- fuel cell
- An electrochemical cell in which the reactants are supplied on a continuing basis.
- functional group
- A set of atoms in a molecule that confer on the molecule a characteristic set of physical and chemical properties.
- fusion
- A nuclear reaction in which small nuclei are united to form larger ones.
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