Manganese (Mn): electron configuration, atomic mass and facts
Manganese (Mn) is element 25 of the periodic table, a transition metal in period 4, group 7. Its electron configuration is [Ar] 3d5 4s2, with electrons arranged in shells 2, 8, 13, 2, and its standard atomic weight is 54.938 u.
▶ Watch Manganese’s electrons orbit in the interactive periodic tableManganese at a glance
| Symbol | Mn |
|---|---|
| Atomic number | 25 |
| Atomic mass | 54.938 u |
| Category | Transition metal |
| Group | 7 |
| Period | 4 |
| Block | d-block |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d5 4s2 |
| Noble-gas shorthand | [Ar] 3d5 4s2 |
| Electrons per shell | 2, 8, 13, 2 |
| Electronegativity (Pauling) | 1.55 |
| State at 20 °C | solid |
Experiments with manganese
Where is Manganese on the periodic table?
Manganese is in period 4, group 7, in the d-block. The period number matches its 4 electron shells, and the block names the subshell its last electrons fill. In the same group, Technetium sits directly below it. Elements in the same column of the d-block often have similar chemistry.
How to work out the electron configuration of Manganese
Put 25 electrons into subshells in order of rising energy, filling each before starting the next: 1s² (2), 2s² (4), 2p⁶ (10), 3s² (12), 3p⁶ (18), 4s² (20), 3d⁵ (25). In shorthand, [Ar] stands for the 18 electrons of argon, giving [Ar] 3d⁵ 4s².
How electronegative is Manganese?
Manganese has a Pauling electronegativity of 1.55, ranking 53 of the 100 elements with a known value (fluorine is highest at 3.98). That is in the middle of the range.
Manganese in the virtual lab
Faradium’s chemistry workbench includes these chemicals that contain manganese: Potassium permanganate, Manganese dioxide. Open the Chemistry Lab to experiment with them.
Frequently asked questions
What is the electron configuration of Manganese?
The electron configuration of Manganese (Mn) is 1s2 2s2 2p6 3s2 3p6 3d5 4s2. In noble-gas shorthand it is written [Ar] 3d5 4s2.
How many electrons does Manganese have in each shell?
Manganese has 25 electrons arranged in shells as 2, 8, 13, 2.
What is the atomic mass of Manganese?
The standard atomic weight of Manganese is 54.938 u, so one mole of Manganese atoms has a mass of about 54.938 g.
Is Manganese a metal?
Yes. Manganese is a transition metal.
Explore nearby elements
More transition metals: Titanium, Vanadium, Chromium, Iron, Cobalt, Nickel. See all elements on the periodic table.