Manganese (Mn) – Periodic Table (Element Information & More)

Manganese (Mn) element Periodic table

This is a SUPER easy guide on Manganese element.

In fact, the table mentioned below is the perfect information box (Which gives you every single detail about the Manganese element in Periodic table.)

So if you want to know anything about manganese element, then this guide is for you.

Let’s finish this very quickly.

Manganese Element (Mn) Information

Appearance of Manganese Appearance of manganese
Silvery white metallic
State of Manganese at STPSolid
Position of Manganese in Periodic tableManganese in periodic table (Position)
Group: 7, Period: 4, Block: d
Category of Manganese elementManganese element category
Transition metals
Atomic number of Manganese, or 
Protons in Manganese
25
Neutrons in Manganese30
Electrons in Manganese25
Symbol of ManganeseMn
Atomic mass of Manganese Manganese (Mn) atomic mass
54.938 u
Electrons arrangement in Manganese

or 

Bohr model of Manganese
Bohr model of manganese (Electrons arrangement in manganese, Mn)
2, 8, 13, 2
Electronic configuration of Manganese[Ar] 3d5 4s2
Atomic radius of Manganese Manganese (Mn) atomic radius
197 picometers (van der Waals radius)
1st Ionization energy of Manganese7.434 eV
Electronegativity of Manganese Electronegativity of manganese (Mn)
1.55 (Pauling scale)
Crystal structure of Manganesecrystal structure of manganese
BCC (Body centered cubic)
Melting point of Manganese1519 K or 1246 °C or 2275 °F
Boiling point of Manganese2334 K or 2061 °C or 3742 °F
Density of Manganese7.47 g/cm3
Main isotope of Manganese55Mn
Who discovered Manganese and when?Who discovered Manganese and when?
Carl Wilhelm Scheele in 1774
CAS number7439-96-5

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Manganese in Periodic table

Manganese element is in group 7 and period 4 of the Periodic table. Manganese is the d-block element and it belongs to transition metals group.

H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
*Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
**Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Why is Manganese in Period 4?

Why is Manganese in Period 4

Let me ask you a question.

How many shells does manganese have?

It’s 4. Right? 

You have already seen the bohr model of manganese atom in the above table.

From the Bohr model, it can be found that the number of orbits or shells in manganese is 4. Hence, as manganese has 4 orbits, it lies in period 4 of the Periodic table. 

Why is Manganese in d-block?

Why is Manganese in d-block

Before knowing this reason, first of all I want to ask you a simple question.

How can you determine the blocks-wise position of elements?

The simple answer: The elements will lie in the s, p, d or f block will completely depend upon the subshell in which the last electron will enter.

For example; the electron configuration of manganese is [Ar] 4s2 3d5

So the last electron of manganese enters the d-subshell or d-orbital. 

Hence, manganese is the d-block element.

Is Manganese a Transition Metal? Why?

Is Manganese a Transition Metal

Yes, Manganese is a transition metal because it has incompletely filled d-orbital in its ground state.

Let me explain the exact meaning of this.

According to the definition of transition metals;
The element should compulsorily have incomplete d-orbitals, either in their ground state (M) or most common oxidation states (M1+, M2+, etc) then only they are called transition metals.

Now, the ground state of Manganese means its normal state in which it has neither gained nor lost any electron/s.

So the ground state of Manganese is Mn.

And the ground state electronic configuration of Manganese is [Ar] 4s2 3d5.

In this state, if we see the electron configuration of Manganese, then it possesses incomplete d-orbitals.

electron configuration of Manganese

Because, there are only five electrons in the d-orbitals. 

In order to have the complete d-orbitals, there must be 10 electrons in it.

But in the ground state electronic configuration of manganese, you can see that it has only 5 electrons in d-orbitals.

Thus, Manganese has incomplete d-orbitals.

And hence, as Manganese has incomplete d-orbitals, it is considered as a transition metal.

Also see: Location of transition metals on periodic table (Image)

5 Interesting facts about Manganese

Interesting facts about manganese element are mentioned below.

  1. According to USGS, around 85 to 90% manganese is used in production of steels.
  2. Around 0.1% (by weight) of the earth’s crust consists of manganese element making it the 12th most abundant element in the earth’s crust.
  3. Magnesium is also required for the human body to perform some metabolic functions.
  4. The hardness of manganese is more than iron, but it is a brittle metal than iron.
  5. South Africa is a leading country which has around 75% of the manganese resources.

Properties of Manganese

The physical and chemical properties of manganese element are mentioned below.

Physical properties of Manganese

Physical properties of manganese are mentioned below.

  • Manganese is a transition metal having a silvery white metallic appearance.
  • Manganese is shiny when polished, but it tarnishes when exposed to air.
  • The melting point of Manganese is 1246 °C and its boiling point is 2061 °C.
  • Atomic mass of manganese is 54.938 u and its density is 7.47 g/cm3.
  • Manganese is a strong but brittle metal. And hence it is not malleable.

Chemical properties of Manganese

Chemical properties of manganese are mentioned below.

  • Manganese is a fairly reactive element, and so it does not exist in free state. But it is always found as a compound with other elements.
  • Manganese has incomplete d-orbitals, hence it is classified as a transition metal on the periodic table.
  • Manganese has many isotopes, but out of these 55Mn has the maximum abundance (almost 100%).
  • Pure manganese is chemically reactive which gets corroded when it comes in contact with water.

Uses of Manganese

Uses of manganese are mentioned below.

  • Manganese is used as an alloying element in the production of steel, glass and other materials.
  • Manganese is an essential mineral element used by the human body for some metabolic functions. And the manganese is obtained from foods like spinach, eggs, grains, rice, nuts, etc.
  • Manganese is also used in alloys of aluminum that are used to manufacture cans for storing beverages.

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References:
Chemical data: Wikipedia, Chemspider
Manganese element: Image by Tomihahndorf at German Wikipedia, CC BY-SA 3.0, via Wikimedia Commons

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