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.

Neptunium (Np)

Atomic Number	93
Atomic Mass	237 u
Category	Actinide
Electron Config	[Rn] 5f⁴ 6d¹ 7s²
Appearance	silvery metallic
Density (STP)	20450 g/L
Melting Point	912 K
Boiling Point	4447 K
Electronegativity	1.36 (Pauling)
Ionization Energy	604.5 kJ/mol
Atomic Radius	175 pm
Crystal Structure	Simple Orthorhombic
Discovered By	Edwin McMillan (1940)

Brief Introduction

Neptunium (Np) is a silvery, radioactive actinide metal. It is the first transuranic element and is produced in nuclear reactors. Key details about Neptunium (Np) are as follows:

Uses: Used in neutron detection equipment and as a precursor for plutonium-238 production (used in radioisotope thermoelectric generators for spacecraft). No large-scale commercial applications.

Production/Extraction: Produced as a byproduct in nuclear reactors when uranium-238 captures neutrons. Can also be extracted from spent nuclear fuel. Not found in significant quantities in nature.

History: Discovered in 1940 by Edwin McMillan and Philip Abelson at UC Berkeley. Named after the planet Neptune, following uranium (named after Uranus).

Health Effects & Safety: Highly radioactive and toxic. Accumulates in bones. Emits alpha particles. Requires strict containment and handling in specialized facilities.

Price/Market: Not commercially traded. Produced and used only in controlled nuclear facilities and research laboratories.

Properties: Radioactive, silvery metallic appearance, dense, exists in multiple oxidation states (+3 to +7), most stable isotope Np-237 has half-life of 2.14 million years, melting point around 644°C.

← Uranium (U) · Plutonium (Pu) →

Periodic Table