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periodicity.
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Periodic table
Period 7Group 4
104Unknown
Rf 267 Atomic mass · u
Transition metals

Rutherfordium

Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 267Rf, has a half-life of approximately 1.3 hours. In the periodic table of the elements, it is a d - block element and the second of the fourth - row transition elements.

Discovery 1969 (Joint Institute for Nuclear Research)
Rutherfordium electron shellsRf104 protons
K2L8M18N32O32P10Q2
A simplified shell model. Electron positions are illustrative.

Physical properties

Values for the element in its standard state.

Density
Not available
Melting point
Not available
Boiling point
Not available
Atomic radius
Not available
Bonding type
Not recorded
Molar heat
Not available

Inside the atom

Electron arrangement and the energy behind its behavior.

Full electron configuration

1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 10 electrons; 6s, 2 electrons; 6p, 6 electrons; 5f, 14 electrons; 6d, 2 electrons; 7s, 2 electrons;

[Rn] represents 86 core electrons. The full view shows them explicitly.

104 electrons Orbital order preserved from source

Electronegativity
Not availablePauling scale
First ionization energy
Not available
Electron affinity
Not available
Van der Waals radius
Not available
Rf RutherfordiumAtomic number 104
UnknownkJ/mol
Ionization energy by atomic number
Atomic numberGaps indicate unavailable data

About rutherfordium

Appearance
Not recorded
Discovery
1969 (Joint Institute for Nuclear Research)

A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.