tables

A compilation of scientific reference data, covering a variety of topics including basic constants, units, and conversion factors; symbols, terminology, and nomenclature; physical constants of organic compounds; properties of the elements and inorganic compounds; fluid properties; analytical chemistry; and others.

Presents 555 fully conjugated Spanish verbs, listing present, imperfect, future, pluperfect, future perfect, present subjunctive, imperfect subjunctive, past perfect subjunctive, and progressive tenses, and including sentences in Spanish and English that illustrate usage.

Presents 501 commonly used Spanish verbs, arranged alphabetically by infinitive, each conjugated in all its tenses, and includes indexes of English-Spanish verbs and common irregular Spanish verb forms identified by infinitives, as well as other reference tools.

Presents a photographic representation of the over 100 elements in the periodic table; and includes facts, figures, and stories of the elements, data on the properties of each, and the year and location in which it was discovered.

Covers principal parts of Spanish verb tenses.

Presents a photographic representation of the over 100 elements in the periodic table; and includes facts, figures, and stories of the elements, data on the properties of each, and the year and location in which it was discovered.

Photographs, diagrams, and illustrations describe the periodic table and how many different kinds of elements there are.

Tables show concurrent events from 4500 B.C. to the 1990s in history, literature, religion, arts, science, and daily life.