Ptable

Ptable turns the familiar grid of elements into a layered chemistry reference with property, electron, isotope, and compound views. It is built for comparison: choose a lens, then let the table reveal the pattern hiding in the columns.

What is Ptable?

Ptable starts with the periodic table everyone recognizes, then gives it several extra drawers to open. The currently visible interface offers separate modes for properties, electrons, isotopes, and compounds, alongside a long menu of values such as electronegativity, melting point, density, conductivity, and oxidation states. That makes it suited to a different kind of lookup: not merely “what is this element?” but “how does this property change across the table?” The site’s own history identifies Michael Dayah as its creator and traces publication to 1997. Independent classroom material from the American Association of Chemistry Teachers uses Ptable for activities on trends, element families, valence electrons, and atomic radius. No controls were operated in this review, so treat it as a richly equipped reference desk whose live behaviors still deserve your own check.

What you can do there

• Inspect element properties
• Compare periodic trends
• Browse isotopes and compounds

Why we picked it

The table makes comparison the main event. Its visible modes turn a familiar chemistry chart into a set of different questions, while independent classroom material shows that the layout can support structured investigations as well as casual curiosity.

How to get the most from it

Pick one question before opening a mode: compare a property, locate an isotope, or inspect a family. Change only one view at a time and scan across a row or down a group before drawing a conclusion from the colors and values.

Good to know

No live controls or element records were used in this review. Data accuracy, accessibility, ads, privacy, printing, installation, donations, external links, and device behavior remain unverified; confirm important scientific facts with primary references.

Who made it, and when?

Michael Dayah is the credited creator or organization. The earliest supported launch date we found is October 1, 1997.