Selenium (Se)
"Meet Selenium, the Light Weaver! Its incredible power amplifies with every photon it absorbs, transforming mere light into vital energy or precise data streams. It guards your cells and keeps your tech humming!"
A memorable persona to anchor Se in your mind.
4.81
Grams per cm³
220.8
Celsius (°C)
190
Radius (pm)
Daily Life Link
It's the silent hero powering photocopiers and laser printers, making sure your documents magically appear!
Discovery & History
Year Discovered
1817
Discovered By
Jöns Jacob Berzelius
Origin of Name
"The name is derived from ''selene'', the Greek name for the Moon."
Technical Properties
Atomic Mass
78.971 u
Standard State
solid
Boiling Point
685°C
Electron Configuration
[Ar] 3d104s24p4
1st Ionization Energy
9.752 eV
Electron Affinity
N/A
Oxidation States
"Like a shapeshifter, it can be a glossy grey solid, a deep red powder, or even a dark, glassy black."
Did You Know?
Light Power-Up! Selenium is a total rockstar when it comes to light! Its electrical conductivity skyrockets when exposed to light, making it a 'photoconductor.' It's like turning on a super-power with a flick of a light switch!
Moon Goddess Name: This element got its name 'Selenium' from Selene, the ancient Greek goddess of the Moon. Why? Because it was discovered alongside Tellurium, named after Tellus, the Earth goddess. Talk about cosmic connections!
Photocopy King: Ever wonder how photocopiers work? Selenium is often the secret ingredient! Its photoconductive magic allows it to create an electrical image of your document that then attracts the toner.
Hair Savior: Dealing with dandruff? Check your shampoo! Selenium sulfide is a common active ingredient in anti-dandruff shampoos, helping to control those flaky bits.