Search Thermo Fisher Scientific
table of Elements
Actinium
Actinium X-ray photoelectron spectra, actinium electron configuration, and other elemental information.
Join the conversation
Actinium • Actinide Rare Earth
Symbol: Ac
Date of discovery: 1899
Name origin: Greek aktinos
Appearance: silvery
Discoverer: Andre Debierne
Obtained from: irradiation of Ra
Melting point: 1050 K
Boiling point: 3300 K
Density[kg/m3]: 10.07
Molar volume: 22.55 × 10-6 m3/mol
Protons/Electrons: 89
Neutrons: 138
Shell structure: 2,8,18,32,18,9,2
Electron configuration: [Rn]6d17s2
Oxidation state: 3
Crystal structure: cubic
Actinium is a silvery metallic element. Actinium gets its name from the Greek word aktinos, meaning beam or ray. Due to its intense radioactivity, actinium glows in the dark with a pale blue light. One hundred and fifty times as radioactive as radium, actinium presents severe health effects if ingested in even the slightest amount. Actinium is used to produce bismuth for medical applications or can be used on its own as an agent for radio-immunotherapy.
Products
Style Sheet for Instrument Cards Original
Style Sheet for Global Design System
Style Sheet for Komodo Tabs
Style Sheet to change H3 to p with em-h3-header class
Style Sheet to change H2 style to p with em-h2-header class
Style Sheet for Products Table Specifications
Style Sheet for Global Design System
Style Sheet for Komodo Tabs
Style Sheet to change H3 to p with em-h3-header class
Style Sheet to change H2 style to p with em-h2-header class
Style Sheet for Products Table Specifications
Fix for left nav
Style Sheet for Support and Service footer
Style Sheet for Fonts
Style Sheet for Cards
Electron microscopy services for
the materials science
To ensure optimal system performance, we provide you access to a world-class network of field service experts, technical support, and certified spare parts.
