Tellurium (Te)

Atomic Number: 52

Relative Atomic Mass: 127.60

Electronegativity: 2.10

Atomic Radius (Picometers): 140

Appearance: Silver-Grey

Occurrence: Natural

Melting Point (Kelvin): 722.66

Boiling Point (Kelvin): 1261

Stable Isotopes: 122, 124, 125, 126

Discoverer: Franz-Joseph Müller von Reichenstein in 1782

Properties: Brittle, Toxic

First Use: Thermoelectrics (1960s)

Modern Uses: Metallurgy, Colour Ceramics

Picture Courtesy of images-of-elements.com

©2011 Grant Dwyer

Antimony (Sb)

Atomic Number: 51

Relative Atomic Mass: 121.7601

Electronegativity: 2.05

Atomic Radius (Picometers): 145

Appearance: Silver-Grey

Occurrence: Natural

Melting Point (Kelvin): 903.78

Boiling Point (Kelvin): 1860

Stable Isotopes: 121, 123

Discoverer: The Ancients

Properties: Toxic, Lustrous

First Use: Pottery (3000 BC)

Modern Uses: Flame Retardants, Alloys

Picture Courtesy of images-of-elements.com

©2011 Grant Dwyer

Tin (Sn)

Atomic Number: 50

Relative Atomic Mass: 118.710

Electronegativity: 1.96

Atomic Radius (Picometers): 145

Appearance: Silver-Grey

Occurrence: Natural

Melting Point (Kelvin): 505.08

Boiling Point (Kelvin): 2875

Stable Isotopes: 112, 114, 115, 116, 117, 118, 119, 120, 122, 124

Discoverer: The Ancients

Properties: Malleable, Ductile

First Use: Bronze (3000 BC)

Modern Uses: Solder, Glass

Picture Courtesy of Alchemist-hp

©2011 Grant Dwyer

Indium (In)

Atomic Number: 49

Relative Atomic Mass: 114.818

Electronegativity: 1.78

Atomic Radius (Picometers): 155

Appearance: Silver-Grey

Occurrence: Natural

Melting Point (Kelvin): 429.7485

Boiling Point (Kelvin): 2345

Stable Isotopes: 113

Discoverers: Ferdinand Reich and Hieronymous Richter

Properties: Soft, Malleable

First Use: Semiconductors (1952)

Modern Uses: Alloys, Lighting

Picture Courtesy of Nerdtalker

©2011 Grant Dwyer

Cadmium (Cd)

Atomic Number: 48

Relative Atomic Mass: 112.411

Electronegativity: 1.69

Atomic Radius (Picometers): 155

Appearance: Silvery Bluish-Grey

Occurrence: Natural

Melting Point (Kelvin): 594.22

Boiling Point (Kelvin): 1040

Stable Isotopes: 110, 111, 112

Discoverers: Karl Hermann and Friedrich Stromeyer in 1817

Properties: Soft, Malleable, Ductile

First Use: Pigments (1840s)

Modern Uses: Batteries, Electroplating

Picture Courtesy of Alchemist-hp

©2011 Grant Dwyer

Silver (Ag)

Atomic Number: 47

Relative Atomic Mass: 107.8682

Electronegativity: 1.93

Atomic Radius (Picometers): 160

Appearance: White

Occurrence: Natural

Melting Point (Kelvin): 1234.93

Boiling Point (Kelvin): 2435

Stable Isotopes: 107, 109

Discoverer: The Ancients

Properties: Soft, Lustrous, Ductile, Malleable

First Use: Ornaments (Unknown)

Modern Uses: Medical, Dentistry

Picture Courtesy of Alchemist-hp

©2011 Grant Dwyer

Palladium (Pd)

Atomic Number: 46

Relative Atomic Mass: 106.42

Electronegativity: 2.20

Atomic Radius (Picometers): 140

Appearance: Silver-White

Occurrence: Natural

Melting Point (Kelvin): 1825.05

Boiling Point (Kelvin): 3236

Stable Isotopes: 102, 104, 105, 106, 108, 110

Discoverer: William Wollaston in 1803

Properties: Lustrous, Soft

First Use: Unknown

Modern Uses: Electronics, Hydrogen Storage

Picture Courtesy of Jurii

©2011 Grant Dwyer