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Hahnium, Dubnium

Information valid for Unp-262 unless otherwise noted

Basic Information

Symbol: Unp, Ha, Db
Atomic Number: 105
Mass: (262.0)
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 105
Number of Neutrons: 157
Classification: Transition Metal
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown
IUPAC Name: Joliotium (Jl)
ACS Name: Hahnium (Ha)
Due to the naming dispute over this element, this site will use the IUPAC Systematic Naming Scheme

Atomic Structure

[Bohr Model of Unnilpentium]
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: 11
    Seventh Energy Level: 2


Isotope Half Life
Unp-258 4.2 seconds


Date of Discovery: 1970
Discoverer: A. Ghiorso
Name Origin: Un (one) nil (zero) pent (five) ium
Uses: No uses known
Obtained From: Man-made