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.

Technetium (Tc)

Atomic Number	43
Atomic Mass	98 u
Category	Transition metal
Electron Config	[Kr] 4d⁵ 5s²
Appearance	shiny gray metal
Density (STP)	11500 g/L
Melting Point	2430 K
Boiling Point	4538 K
Electronegativity	1.9 (Pauling)
Ionization Energy	702 kJ/mol
Atomic Radius	135 pm
Crystal Structure	Simple Hexagonal
Discovered By	Emilio Segrè (1937)

Brief Introduction

Technetium (Tc) is a silvery-gray radioactive metal that is the lightest element with no stable isotopes. All isotopes are radioactive, making it extremely rare in nature. Key details about Technetium (Tc) are as follows:

Uses: Primarily used in nuclear medicine (Tc-99m is the most widely used medical radioisotope for diagnostic imaging), as a corrosion inhibitor for steel, and in research. Limited other applications due to radioactivity and scarcity.

Production/Extraction: Produced artificially in nuclear reactors as a fission product of uranium or by neutron bombardment of molybdenum-98. Tc-99m is produced from Mo-99 generators in hospitals. Extremely rare in nature (found in trace amounts in uranium ores and as a spontaneous fission product).

History: First element to be artificially produced. Discovered in 1937 by Carlo Perrier and Emilio Segrè in Italy by bombarding molybdenum with deuterons. Predicted by Mendeleev (as "eka-manganese"). Named from Greek "technetos" (artificial).

Health Effects & Safety: Radioactive and must be handled with appropriate precautions. Tc-99m has a short half-life (6 hours), making it ideal for medical imaging with minimal radiation exposure. Tc-99 (longer half-life) is a nuclear waste concern.

Price/Market: Not commercially traded in metallic form. Medical isotope Tc-99m is produced in Mo-99 generators distributed to hospitals. Supply disruptions in Mo-99 production have occasionally caused medical imaging shortages.

Properties: Lightest radioactive element, no stable isotopes, silvery appearance (when isolated), chemically similar to rhenium and manganese, exhibits multiple oxidation states (-1 to +7), and slowly tarnishes in moist air.

← Molybdenum (Mo) · Ruthenium (Ru) →

Periodic Table