ODWS icon

The Open Door Web Site
HOMEPAGE BIOLOGY PHYSICS ELECTRONICS HISTORY HISTORY OF SCI & TECH MATH STUDIES LEARNING FRENCH STUDY GUIDE  PHOTO GALLERY
CHEMISTRY HOMEPAGE TOPIC CHAPTERS PHYSICAL SCIENCE LABORATORY WORK 

 

 

 

Navigation

Next (in period)
Previous (in period)
Visual Chemistry Homepage : The Periodic Table

 

Tutorials

Atomic Structure
Electrovalent Bonding
Covalent Bonding
Water
Transition Metals
Metal or Non-metal?
Noble Gases

 

General

Element Identification Timeline

VISUAL CHEMISTRY

Custom Search

Thallium

What the name means: The name thallium derives from the Greek word thallos, meaning a "budding, green twig".

Thallium

Thallium atom

Thallium atom

 

 

(Note: Can also form 1+ ions.)

Thallium ion

 

Thallium ion

 

Who identified thallium?: In 1861, British chemist, Sir William Crookes analysed a sample of residue from an industrial plant that produced sulfuric acid. He had been given the sample because he was interested in finding out if it contained the elements selenium and tellurium. Spectroscopic analysis did not show either of these two elements as being present. However, Crookes saw a vivid green line that did not correspond to any known element at that time. He deduced that he had identified a new element that he called thallium on account of its spectrum. A year later, in 1862, a French chemist named Claude-Auguste Lamy used electrolysis to isolate thallium

 

Properties

TLPROPS

STP = standard temperature and pressure.
Usually considered as room temperature and pressure.

 

About thallium: Thallium is a soft, silvery-grey metal that tarnishes quickly in the air to form a grey-blue coating. It is a very toxic element that was once used in rat poisons but was considered to dangerous and its use has now been discontinued.

 

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.

Donate to the Open Door Web Site using PayPal

SITE MAP
WHAT'S NEW?
ABOUT

PRIVACY

COPYRIGHT

SPONSORSHIP

DONATIONS

ADVERTISING

© The Open Door Team 2017
Any questions or problems regarding this site should be addressed to the webmaster

© Shirley Burchill 2017

Hosted By
Web Hosting by HostCentric


SiteLock