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.

Chlorine (Cl)

Atomic Number	17
Atomic Mass	35.45 u
Category	Diatomic nonmetal
Electron Config	[Ne] 3s² 3p⁵
Appearance	pale yellow-green gas
Density (STP)	3.214 g/L
Melting Point	171.6 K
Boiling Point	239.11 K
Electronegativity	3.16 (Pauling)
Ionization Energy	1251.2 kJ/mol
Atomic Radius	100 pm
Crystal Structure	Base Orthorhombic
Discovered By	Carl Wilhelm Scheele (1774)

Brief Introduction

Chlorine (Cl) is a yellow-green, dense, toxic diatomic gas with a pungent, suffocating odor. It is highly reactive and is never found free in nature, but is common in compounds, especially salt (NaCl). Key details about Chlorine (Cl) are as follows:

Uses: Used for water purification and disinfection (swimming pools, drinking water), production of PVC (polyvinyl chloride) plastic, bleaching agents, solvents, pesticides, and many pharmaceuticals. Also used in paper and textile industries.

Production/Extraction: Produced industrially through electrolysis of brine (sodium chloride solution) via the chlor-alkali process, which simultaneously produces chlorine, hydrogen, and sodium hydroxide. Also produced via the electrolysis of molten salt.

History: Discovered by Carl Wilhelm Scheele in 1774, though he didn't recognize it as an element. Identified as an element by Humphry Davy in 1810 and named from Greek "chloros" (greenish-yellow). Used as a chemical weapon in WWI.

Health Effects & Safety: Highly toxic gas; even low concentrations irritate respiratory system and eyes. Liquid chlorine causes severe burns. Chlorine gas was used in chemical warfare. Chloride ions (Cl⁻) are essential for human physiology (stomach acid, electrolyte balance). Disinfection byproducts from chlorinated water raise minor health concerns.

Price/Market: Moderate pricing; produced in massive quantities globally. Market tied to PVC production and water treatment. Transportation and storage require special handling due to toxicity.

Properties: Strong oxidizing agent, characteristic yellow-green color, highly electronegative, reacts with most elements, denser than air, bleaching properties, and exists in multiple oxidation states in compounds.

← Sulfur (S) · Argon (Ar) →

Periodic Table