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Information valid for Une-Mt-266 unless otherwise noted

Basic Information

Symbol: Une, Mt
Atomic Number: 109
Mass: (266.0)
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 109
Number of Neutrons: 157
Classification: Transition Metal
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown
IUPAC Name: Meitnerium (Mt)
ACS Name: Meitnerium (Mt)
Due to the naming dispute over this element, this site will use the IUPAC Systematic Naming Scheme

Atomic Structure

[Bohr Model of Unnilennium]
Number of Energy Levels: 7

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 32
    Sixth Energy Level: 15
    Seventh Energy Level: 2


Isotope Half Life
Une-226 3.4 milliseconds


Date of Discovery: 1982
Discoverer: Heavy Ion Research Laboratory
Name Origin: Un (one) nil (zero) enn (nine) ium
Uses: No uses known
Obtained From: Man-made