Element 75 · Rhenium (Re)

Rhenium Bohr model: diagram and electrons per shell

The rhenium Bohr model shows a rhenium atom (Re) as a small nucleus with its electrons circling it in 6 shells: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P. This page has a rotating 3D rhenium Bohr model, a flat diagram, a table of the electrons in each shell and the steps to draw it yourself.

Rotate the rhenium Bohr model in 3D

Drag to orbit, scroll to zoom.

This is a Bohr model of rhenium (Re), a simplified picture of a single rhenium atom. Its nucleus holds 75 protons, and a neutral rhenium atom has 75 electrons, arranged around it in 6 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P).

Re K · 21s² L · 82s² 2p⁶ M · 183s² 3p⁶ 3d¹⁰ N · 324s² 4p⁶ 4d¹⁰ 4f¹⁴ O · 135s² 5p⁶ 5d⁵ P · 26s²

Rhenium Bohr model diagram

Bohr model diagram of rhenium: a nucleus of 75 protons with 75 electrons on 6 shells, 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P, each ring labelled with its shell letter. — The rhenium Bohr model drawn flat: each ring is a shell, labelled with its letter, and every dot is an electron (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P).

Rhenium electrons per shell

A neutral rhenium atom has 75 electrons, one for each of its 75 protons. They fill the shells from the nucleus outwards: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P.

Electrons in each shell of the rhenium Bohr model
Shell	Shell number (n)	Electrons	Most it can hold (2n²)	Subshells
K	1	2	2	1s²
L	2	8	8	2s² 2p⁶
M	3	18	18	3s² 3p⁶ 3d¹⁰
N	4	32	32	4s² 4p⁶ 4d¹⁰ 4f¹⁴
O	5	13	50	5s² 5p⁶ 5d⁵
P	6	2	72	6s²

How the rhenium Bohr model builds up, shell by shell

Watch the rhenium Bohr model come together: the nucleus first, then each shell in turn, from the innermost outwards, with its electrons joining the ring. The legend names every shell and counts its electrons, so you can read off the arrangement (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P) as it forms.

Animation of the rhenium Bohr model being built: a nucleus of 75 protons appears first, then each shell grows in around it and takes its electrons, giving 75 electrons on 6 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P). — The rhenium Bohr model built up in six seconds: the nucleus first, then each shell with its electrons, ending with 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P. Protons are red, neutrons yellow and electrons blue.

How to draw the rhenium Bohr model

Find the atomic number. Rhenium has atomic number 75, so a neutral atom has 75 protons and 75 electrons.
Draw the nucleus. Put a circle in the centre and write Re in it. The 75 protons sit there with the neutrons.
Draw the shells. Sketch 6 shells as rings around the nucleus. A shell holds at most 2n² electrons: 2 in the first, 8 in the second, 18 in the third and 32 in the fourth.
Place the electrons. Fill from the inside out: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 13 in shell O and 2 in shell P.
Check the total. 2 + 8 + 18 + 32 + 13 + 2 = 75, the atomic number, so every electron is accounted for.

Atomic data for the rhenium Bohr model

The numbers behind the rhenium Bohr model, grouped by topic. Radii are in picometres (pm) and energies in kilojoules per mole (kJ/mol).

Identity

Symbol: Re
Atomic number: 75
Atomic mass: 186.2071 u
Family: Transition Metals
Position: group 7, period 6
Block: d-block

Electron configuration

Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁵
Shorthand: [Xe] 4f¹⁴ 5d⁵ 6s²
Electrons per shell: 2, 8, 18, 32, 13, 2
Outer-shell electrons: 2 in shell P

Ionisation energies

I₁: 760
I₂: 1260
I₃: 2510
I₄: 3640

Energy to remove each electron in turn (kJ/mol). A sharp jump means the next electron comes from an inner shell.

Atomic radii

Calculated (pm): 188
Empirical (pm): 135
Covalent (pm): 131

Electronegativity and electron affinity

Electronegativity (Pauling): 1.9
Electron affinity (kJ/mol): 5.827

Oxidation states

Charges the element commonly takes in compounds.

Physical properties, abundance and history of rhenium

Bulk properties of rhenium, how common it is, who discovered it and some of its compounds.

Physical properties

Phase at room conditions: Solid
Appearance: Silvery-grayish
Melting point: 3185.85°C (3459 K)
Boiling point: 5595.85°C (5869 K)
Density: 21.02 g/cm³
Thermal conductivity (W/m·K): 48
Specific heat (J/g·K): 0.137
Molar heat capacity (J/mol·K): 25.48
Heat of fusion (kJ/mol): 34
Heat of vaporisation (kJ/mol): 704

Abundance

Earth's crust (mg/kg): 0.001
Oceans (mg/L): 0

Discovery

Discovered by: Masataka Ogawa
Year: 1925
Named by: Walter Noddack

Common compounds

Rhenium Re
Bromopentacarbonylrhenium C5BrO5Re
Perrhenic acid HO4Re
Sodium perrhenate NaO4Re
Rhenium hexafluoride F6Re
Rhenium chloride (ReCl3) Cl3Re
Ammonium perrhenate H4NO4Re
Rhenium selenide (ReSe2) ReSe2

Compounds listed in the PubChem database.

Main isotopes of rhenium

Isotopes of rhenium share the same 75 protons but differ in neutrons. Natural isotopes come first, then the longest-lived others.

Main isotopes of rhenium: mass number, abundance, half-life and decay
Mass number	Natural abundance	Half-life	Decay
182	–	64.2 h	β⁺
183	–	70 d	EC
184	–	35.4 d	β⁺
185	37.4 %	stable	–
186	–	3.719 d	β⁻, EC
187	62.6 %	41.6 Gy	β⁻, α

α = alpha decay, β⁻ = beta-minus, β⁺ = beta-plus, EC = electron capture, SF = spontaneous fission, p / n = proton / neutron emission.

More about rhenium

Rhenium on the periodic table – properties, isotopes, uses and the full rhenium page.
Transition Metals – all transition metal elements and their trends.
Bohr model of every element – the Bohr model of all 118 elements.