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Meitnerium (Mt) – Element 109 of the periodic table

Meitnerium (symbol Mt) is element number 109 of the periodic table and belongs to the “Transition metal” category. Its atomic mass is about 278, and its phase under standard conditions is Solid (a theoretical prediction). This element sits in period 7 and group 9 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 32, 32, 15, 2. The short electron configuration of Meitnerium is [Rn] 5f¹⁴ 6d⁷ 7s². Known uses of Meitnerium include Scientific research.

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Meitnerium is a radioactive, mostly synthetic element; its data may be based on limited experiments or theoretical prediction.

Properties of Meitnerium

Atomic number
109
Chemical symbol
Mt
Atomic mass
278
Category
Transition metal
Period
7
Group
9
Phase
Solid (a theoretical prediction)
Protons
109
Electrons
109
Neutrons (approx.)
169
Electron shells
2, 8, 18, 32, 32, 15, 2
Outer-shell electrons
2
Discovered
GSI Helmholtz Centre for Heavy Ion Research (1982)

Electron configuration of Meitnerium

The electron configuration of Meitnerium (Mt), with 109 electrons, is shown below. The last shell (shell 7) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d⁷ 7s²
Short configuration
[Rn] 5f¹⁴ 6d⁷ 7s²
Last shell
7s²

This synthetic element’s electron configuration is a theoretical prediction.

What is electron configuration and how is it written?

Electron shells of Meitnerium

Distribution of 109 electrons of Meitnerium across shells K to Q:

  1. K2
  2. L8
  3. M18
  4. N32
  5. O32
  6. P15
  7. Q2

What is a transition metal?

The transition metals are the d-block elements: usually good conductors of heat and electricity, with several oxidation states, and they form colourful compounds and important catalysts.

Uses of Meitnerium

Frequently asked questions about Meitnerium

What is the atomic number of Meitnerium?

The atomic number of Meitnerium (Mt) is 109; that is, every atom of it has 109 protons.

What is the electron configuration of Meitnerium?

The electron configuration of Meitnerium (Mt) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d⁷ 7s²; in short form it is [Rn] 5f¹⁴ 6d⁷ 7s², and its last shell is 7s².

What is the chemical symbol of Meitnerium?

The chemical symbol of Meitnerium is Mt.

Where is Meitnerium located in the periodic table?

Meitnerium is located in period 7 and group 9 and belongs to the “Transition metal” category.

What is the atomic mass of Meitnerium?

The atomic mass of Meitnerium is about 278 (atomic mass units).

What is the phase of Meitnerium under normal conditions?

The phase of Meitnerium under standard conditions is Solid (a theoretical prediction).

What are the uses of Meitnerium?

Uses of Meitnerium include Scientific research.

Who discovered Meitnerium?

Meitnerium was discovered by GSI Helmholtz Centre for Heavy Ion Research in 1982.

Elements in the same category as Meitnerium (Transition metal)

Palladium (Pd)Silver (Ag)Cadmium (Cd)Hafnium (Hf)Tantalum (Ta)Tungsten (W)Rhenium (Re)Osmium (Os)Iridium (Ir)Platinum (Pt)Gold (Au)Mercury (Hg)Rutherfordium (Rf)Dubnium (Db)Seaborgium (Sg)Bohrium (Bh)Hassium (Hs)Darmstadtium (Ds)Roentgenium (Rg)Copernicium (Cn)

See all Transition metals

Meitnerium’s group 9 neighbours

Cobalt (Co)Rhodium (Rh)Iridium (Ir)

Group 9 of the periodic table