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.

Thulium (Tm)

Atomic Number	69
Atomic Mass	168.934222 u
Category	Lanthanide
Electron Config	[Xe] 4f¹³ 6s²
Appearance	silvery gray
Density (STP)	9320 g/L
Melting Point	1818 K
Boiling Point	2223 K
Electronegativity	1.25 (Pauling)
Ionization Energy	596.7 kJ/mol
Atomic Radius	175 pm
Crystal Structure	Simple Hexagonal
Discovered By	Per Teodor Cleve (1879)

Brief Introduction

Thulium (Tm) is a soft, silvery rare earth metal that is the second rarest naturally occurring lanthanide (after promethium). It is reasonably stable in air and has limited commercial applications. Key details about Thulium (Tm) are as follows:

Uses: Used in portable X-ray devices (thulium-170 source), lasers (thulium fiber laser for medical applications), euro banknotes (anti-counterfeiting), and in ferrites for microwave equipment. Limited applications due to rarity and cost.

Production/Extraction: Extracted from monazite and bastnäsite ores. Second rarest stable rare earth element. China is the primary producer. Production is very limited.

History: Discovered in 1879 by Per Teodor Cleve in Sweden through spectroscopic analysis of erbium oxide. Named after Thule, the ancient name for Scandinavia.

Health Effects & Safety: Low toxicity with very limited data due to rarity. No known biological role. Radioactive isotope Tm-170 requires appropriate handling.

Price/Market: Very expensive due to extreme rarity and limited production. Niche applications in medical and scientific fields. Market is very small.

Properties: Soft and malleable, exhibits +2 and +3 oxidation states, second rarest stable lanthanide, paramagnetic, and radioactive isotope Tm-170 is used as a radiation source.

← Erbium (Er) · Ytterbium (Yb) →

Periodic Table