Periodic Table/Meitnerium
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109Mt276 Da

Meitnerium

Transition Metal·Period 7, Group 9·s-block

Half-life of approximately 5 ms. The creation of this element demonstrated that fusion techniques could indeed be used to make new, heavy nuclei. Made and identified by physicists of the Heavy Ion Research Laboratory, Darmstadt, West Germany in 1982. Named in honor of Lise Meitner, the Austrian physicist.

Gallery

No Image Found

Chemical Elements A Virtual Museum under a Creative Commons Attribution 3.0 Unported License, source: https://images-of-elements.com/meitnerium.php

Bohr model of Meitnerium

Physical Propertiesmass · density · phase · crystal

Atomic Mass

276Da

Density

37.4000g/cm³

Phase (STP)

Solid

Melting Point

—

Boiling Point

—

Molar Heat

—

Crystal Structure

—

Atomic Radiiatomic · covalent · van der Waals

Atomic (Empirical)

—

Covalent

129.00pm

Van der Waals

—

Electronic Propertieselectronegativity · ionization · affinity

Electron Configuration

[Rn] 5f14 6d7 7s2

Electron Shells

2, 8, 18, 32, 32, 15, 2

Electronegativity

—

Electron Affinity

—

1st Ionization Energy

50.0kJ/mol

Oxidation States

—

Orbital DiagramAufbau · Hund's rule · Pauli exclusion

↑↓
1s2
↑↓
2s2
↑↓
↑↓
↑↓
2p6
↑↓
3s2
↑↓
↑↓
↑↓
3p6
↑↓
↑↓
↑↓
↑↓
↑↓
3d10
↑↓
4s2
↑↓
↑↓
↑↓
4p6
↑↓
↑↓
↑↓
↑↓
↑↓
4d10
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
4f14
↑↓
5s2
↑↓
↑↓
↑↓
5p6
↑↓
↑↓
↑↓
↑↓
↑↓
5d10
↑↓
6s2
↑↓
↑↓
↑↓
6p6
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
5f14
↑↓
↑↓
↑
↑
↑
6d7
↑↓
7s2

Full: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f14 6d7 7s2Short: [Rn] 5f14 6d7 7s2

Ionization Energies (68 known)

1st50.0 kJ/mol2nd94.0 kJ/mol3rd109.0 kJ/mol4th187.0 kJ/mol5th202.0 kJ/mol6th235.9 kJ/mol7th257.0 kJ/mol8th289.0 kJ/mol9th318.0 kJ/mol10th346.0 kJ/mol11th386.0 kJ/mol12th406.0 kJ/mol13th445.0 kJ/mol14th1035.0 kJ/mol15th1072.0 kJ/mol16th1112.0 kJ/mol17th1154.0 kJ/mol18th1195.0 kJ/mol19th1234.0 kJ/mol20th1311.0 kJ/mol21th1352.0 kJ/mol22th1397.0 kJ/mol23th1439.0 kJ/mol24th4464.0 kJ/mol25th4551.0 kJ/mol26th4640.0 kJ/mol27th4740.0 kJ/mol28th4830.0 kJ/mol29th4920.0 kJ/mol30th5160.0 kJ/mol31th5250.0 kJ/mol32th5360.0 kJ/mol33th5450.0 kJ/mol34th5840.0 kJ/mol35th5930.0 kJ/mol36th6030.0 kJ/mol37th6130.0 kJ/mol38th7030.0 kJ/mol39th7150.0 kJ/mol40th7430.0 kJ/mol41th7550.0 kJ/mol42th11460.0 kJ/mol43th11660.0 kJ/mol44th11870.0 kJ/mol45th12100.0 kJ/mol46th12320.0 kJ/mol47th12530.0 kJ/mol48th13200.0 kJ/mol49th13400.0 kJ/mol50th13700.0 kJ/mol51th13900.0 kJ/mol52th14500.0 kJ/mol53th14700.0 kJ/mol54th14900.0 kJ/mol55th15100.0 kJ/mol56th17900.0 kJ/mol57th18200.0 kJ/mol58th18700.0 kJ/mol59th18900.0 kJ/mol60th36700.0 kJ/mol61th37200.0 kJ/mol62th37800.0 kJ/mol63th38300.0 kJ/mol64th48500.0 kJ/mol65th49400.0 kJ/mol66th50300.0 kJ/mol67th196392.0 kJ/mol68th199605.0 kJ/molSuccessive Ionization Energies

Abundanceby mass

Biological Role

No biological role

Synthetic, radioactive element. No biological role.

Discovery

Discovered By

Heavy Ion Research Laboratory (HIRL)

Named By

—

Year

1982

Nuclear Data

Known Isotopes

18

Stable Isotopes

0

Stable Mass Numbers

None

Isotopes of Mt18 known

NuclideZNMass (AMU)Half-lifeDecayJπAbundance
265Mt109156265.135937Unknownα——
266Mt109157266.1370622.00 msα (1%), SF——
267Mt109158267.137189Unknownα——
280Mt109171280.161579Unknownα, SF——
281Mt109172281.163608Unknownα, SF——
282Mt109173282.166888Unknownα (1%), SF——

Click any isotope for its full page with decay chain:

265Mt266Mt267Mt268Mt269Mt270Mt271Mt272Mt273Mt274Mt275Mt276Mt277Mt278Mt279Mt280Mt281Mt282Mt
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