Periodic Table - Ptable
https://ptable.com/?lang=en
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses. Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.
DA: 25 PA: 15 MOZ Rank: 9