Ptable: The interactive periodic table

        October 1, 1997 Ptable | Web | resource: science

A periodic table shows elements from hydrogen (H, Z =1) to Lawrencium (La, Z = 103) in regular groups (1-18) and periods (1-7). This highly instructive interactive app shows much more: symbol origins, orbitals, isotopes, compound mixing, formula searching, multiple layouts, states of matter at different temperatures, chemical/physical trends, ...