What is the Interactive Periodic Table?

The Interactive Periodic Table is a free, modern web application that displays all 118 elements with detailed properties, 3D Bohr model visualizations, crystal structure renderings, and text-to-speech pronunciation. It works on desktop, tablet, and mobile devices.

What information is available for each element?

Each element page includes atomic number, atomic mass, electron configuration, physical properties (density, melting and boiling points, state of matter), chemical properties (electronegativity, ionization energy, electron affinity), an interactive 3D Bohr model, 3D crystal structure, and an AI-generated educational summary.

Can I use this periodic table for teaching?

Yes. The Interactive Periodic Table includes a full-screen mode designed for projectors and classroom presentations. All content is educational and completely free to use without registration.

Does it work on mobile devices?

Yes. The web app is fully responsive and also available as native iOS and Android apps that can be downloaded from the app stores.

What are the 3D visualizations?

Each element features an interactive 3D Bohr model showing electron shells orbiting the nucleus, and a 3D crystal structure rendering showing the element's atomic arrangement. Both are powered by Three.js and React Three Fiber.

Is this periodic table free?

Yes, the Interactive Periodic Table is completely free with no registration, no ads, and no data collection required.

How many elements are included?

All 118 confirmed elements from Hydrogen (H, atomic number 1) through Oganesson (Og, atomic number 118) are included with full data and visualizations.

Can I hear how element names are pronounced?

Yes. The text-to-speech feature allows you to hear the correct pronunciation of any element name. This works on both the web version and native mobile apps.

Promethium (Pm)

Atomic Number	61
Atomic Mass	145 u
Category	Lanthanide
Electron Config	[Xe] 4f⁵ 6s²
Appearance	metallic
Density (STP)	7264 g/L
Melting Point	1315 K
Boiling Point	3273 K
Electronegativity	1.13 (Pauling)
Ionization Energy	540 kJ/mol
Atomic Radius	185 pm
Crystal Structure	Simple Hexagonal
Discovered By	Chien Shiung Wu (1945)

Brief Introduction

Promethium (Pm) is a rare earth metal that is radioactive with no stable isotopes. It is extremely rare in nature and is primarily produced artificially. Key details about Promethium (Pm) are as follows:

Uses: Used in luminous paint for watches and instruments (now largely replaced), atomic batteries for pacemakers and spacecraft (historical), thickness gauges, and in research applications.

Production/Extraction: Produced as a byproduct of uranium fission in nuclear reactors. Extremely rare in nature (trace amounts in uranium ores from spontaneous fission). All isotopes are radioactive.

History: Predicted by Mendeleev. First produced in 1945 by Jacob Marinsky, Lawrence Glendenin, and Charles Coryell at Oak Ridge National Laboratory. Named after Prometheus, the Greek Titan who stole fire from the gods.

Health Effects & Safety: Radioactive and must be handled with appropriate precautions. Emits beta radiation. Limited toxicity data due to rarity. Requires shielding and containment.

Price/Market: Not commercially available in significant quantities. Produced only for specialized research and historical applications. Extremely expensive due to production difficulty.

Properties: Radioactive (no stable isotopes), most stable isotope Pm-145 has half-life of 17.7 years, exhibits +3 oxidation state, glows faintly in the dark due to radioactivity, and chemically similar to other lanthanides.

← Neodymium (Nd) · Samarium (Sm) →

Periodic Table