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Rutherfordium (Rf) – Element 104 of the periodic table

Rutherfordium (symbol Rf) is element number 104 of the periodic table and belongs to the “Transition metal” category. Its atomic mass is about 267, and its phase under standard conditions is Solid (a theoretical prediction). This element sits in period 7 and group 4 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 32, 32, 10, 2. The short electron configuration of Rutherfordium is [Rn] 5f¹⁴ 6d² 7s². Known uses of Rutherfordium include Scientific research.

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

Properties of Rutherfordium

Atomic number
104
Chemical symbol
Rf
Atomic mass
267
Category
Transition metal
Period
7
Group
4
Phase
Solid (a theoretical prediction)
Protons
104
Electrons
104
Neutrons (approx.)
163
Electron shells
2, 8, 18, 32, 32, 10, 2
Outer-shell electrons
2
Discovered
Dubna Research Institute (1964)

Electron configuration of Rutherfordium

The electron configuration of Rutherfordium (Rf), with 104 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 6d² 7s²
Short configuration
[Rn] 5f¹⁴ 6d² 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 Rutherfordium

Distribution of 104 electrons of Rutherfordium across shells K to Q:

  1. K2
  2. L8
  3. M18
  4. N32
  5. O32
  6. P10
  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 Rutherfordium

Frequently asked questions about Rutherfordium

What is the atomic number of Rutherfordium?

The atomic number of Rutherfordium (Rf) is 104; that is, every atom of it has 104 protons.

What is the electron configuration of Rutherfordium?

The electron configuration of Rutherfordium (Rf) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d² 7s²; in short form it is [Rn] 5f¹⁴ 6d² 7s², and its last shell is 7s².

What is the chemical symbol of Rutherfordium?

The chemical symbol of Rutherfordium is Rf.

Where is Rutherfordium located in the periodic table?

Rutherfordium is located in period 7 and group 4 and belongs to the “Transition metal” category.

What is the atomic mass of Rutherfordium?

The atomic mass of Rutherfordium is about 267 (atomic mass units).

What is the phase of Rutherfordium under normal conditions?

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

What are the uses of Rutherfordium?

Uses of Rutherfordium include Scientific research.

Who discovered Rutherfordium?

Rutherfordium was discovered by Dubna Research Institute in 1964.

Elements in the same category as Rutherfordium (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)Dubnium (Db)Seaborgium (Sg)Bohrium (Bh)Hassium (Hs)Meitnerium (Mt)Darmstadtium (Ds)Roentgenium (Rg)Copernicium (Cn)

See all Transition metals

Rutherfordium’s group 4 neighbours

Titanium (Ti)Zirconium (Zr)Hafnium (Hf)

Group 4 of the periodic table