Atomic Number 81☢️ (+ facts: Sources, Uses, Color and more...) rev. 2022

All atoms have an atomic number. But what is the chemical element that has 81 as atomic number?

The answer is Thallium and there is so much cool stuff about Thallium that people don't know that I would keep reading if I were you.

Alright now to the facts!

Thallium Overview

Atomic Number

81

Learn more about the atomic number.

Description

Soft gray metal that looks like lead.

Atomic Symbol

Tl (Thallium)

Discovery

Discovered By: Sir William Crookes

Year: 1861

Location: England

State at 20 °C

solid

Sources

Found in iron pyrites. Also in crookesite, hutchinsonite and lorandite. Most is recovered from the byproducts of lead and zinc refining.

Uses

Its compounds are used in rat and ant poisons. Also for detecting infrared radiation.

Atomic Mass

204,3833

Learn more about the atomic mass.

Name Origin

Greek: thallos (green twig), for a bright green line in its spectrum.

Want to learn more details and data? Check my Elements Comprehensive List.

Colored Periodic Table

Need an editable periodic table to edit? Maybe add your school logo, work team or anything else to maker your paper look cool?

Along with basic atom / element information (like Thallium-(81) atomic number and all the other atomic data), it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...

How about an incentive to share this post? (You will help other colleagues find this blog)

Download and enjoy this complete and colored periodic table for you to edit and enjoy. It's in an editable excel format or .ods (open).
[lock][Download excel ##download##]
[Download open .ods format ##download##][/lock]