Atomic Number
25
Element 25
Manganese (Mn)
Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in minerals in combination with iron.
Atomic Mass
54.938 u
Category
Transition Metal
Period
4
Group
Group 7: manganese group
Phase
solid
Density
7.3 g/cm3
Electron Shells
2, 8, 13, 2
Atomic Structure
Protons: 25. Electrons: 25. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
Why Manganese Matters
Manganese helps connect atomic number 25, transition metal behavior, period 4 trends, and electron shell structure. Its solid phase, atomic mass of 54.938 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Manganese was discovered 1774 by Carl Wilhelm Scheele, Johan Gottlieb Gahn. Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in minerals in combination with iron.
Safety and Handling Context
Manganese is presented here for learning and comparison. Pure elements and laboratory compounds can have hazards that depend on dose, form, and setting.
Related Elements
Frequently Asked Questions
- What is the atomic number of Manganese?
- Manganese has atomic number 25, which means a neutral atom has 25 protons and 25 electrons.
- What is the chemical symbol for Manganese?
- The chemical symbol for Manganese is Mn.
- What category is Manganese in?
- Manganese is classified as a transition metal and sits in period 4 of the periodic table.
Explore Manganese in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Manganese to neighboring elements without losing your place.