Page 336 - Theory and Problems of BEGINNING CHEMISTRY

GLOSSARY 325

titration measured neutralization reaction (or other type) to determine the concentration or number of moles
of one reactant from data about another.
total bond order the number of pairs of electrons on an atom that are shared with other atoms.
transition groups the groups that extend only as high as the fourth period of the periodic table. That is, the
groups containing the elements with atomic numbers 21 to 30, 39 to 48, 57, 72 to 80, 89, and 104–109, arising
from the filling of the 3d,4d,5d, and 6d subshells with electrons.
transmutation the change of one element into another (by a nuclear reaction).

triple bond a covalent bond with three shared pairs of electrons.
tritium the isotope of hydrogen with mass number 3.

unary minus the minus sign attached to a number, which makes it negative, as in –2.
unsaturated solution a solution holding less solute than a saturated solution would hold at that temperature.

valence shell the outermost electron shell of a neutral atom.
vaporization changing from a liquid to a gas; evaporation.

vapor pressure the pressure of the vapor of a liquid in equilibrium with that same substance in the liquid phase.
The vapor pressure for a given substance is determined by the temperature only.
voltage electric potential.

volumetric flask a flask calibrated to hold an exact volume of liquid.

w symbol for weight.
weak acid a hydrogen-containing compound that reacts somewhat but not completely with water to form ions.
(Weak acids react almost completely with bases, however.)
weight the measure of the attraction of a body to the earth.

work force times the distance through which the force is applied.

X A mole fraction of A.

-yne name ending for the alkyne series of hydrocarbons.

Z symbol for atomic number.