25 Mn Manganese 54,938 u

Manganese

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الدورة
4
المجموعة
7
الكتلة
d-كتلة
الطور (STP)
Solid

Manganese is a hard, brittle transition metal essential for steel production. It is also important in biological systems as a cofactor for many enzymes.

المظهر: Silvery metallic

About Manganese

Hard and brittle, manganese is a silvery transition metal that is essential to steelmaking, where it improves strength during production. It has atomic number 25 and an atomic mass of 54.938, a density of 7.21 g/cm³, and a melting point of 1519 K. Its half-filled d subshell in the [Ar] 3d5 4s2 configuration gives an electronegativity of 1.55 and a first ionization energy of 717 kJ/mol. Johan Gottlieb Gahn first isolated the metal in 1774. Beyond metallurgy, manganese is important in biology as a cofactor for many enzymes. It belongs to group 7, period 4.

الخصائص الفيزيائية

الكتلة الذرية 54.938 u
الكثافة 7.21 g/cm³
نقطة الانصهار 1245.8 °C
نقطة الغليان 2060.8 °C
الطور عند STP Solid
نصف القطر الذري 161.0 pm

الخصائص الإلكترونية

الكهروسالبية 1.55
طاقة التأين 717.3 eV
إلكترونات التكافؤ 7

التوزيع الإلكتروني

التهيئة [Ar] 3d⁵ 4s²

Electron Shell Configuration

Manganese electron shell configuration Mn 2e⁻ 8e⁻ 13e⁻ 2e⁻
Electron shell structure of Manganese — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 13
4 (N) 2

Position in Periodic Table

Manganese position in the periodic table Mn

الاكتشاف

اكتشفه: Johan Gottlieb Gahn
السنة: 1774

الكتلة والدورة

الكتلة

s p d f

الدورة

1 2 3 4 5 6 7

الجدول الدوري

اللانثانيدات الأكتينيدات

التفاعلات المتضمنة لـ Mn

Zinc-Carbon Battery (Leclanché Cell)

Zn + 2MnO₂ + 2NH₄Cl → ZnCl₂ + Mn₂O₃ + 2NH₃ + H₂O

Electrochemical

Alkaline Battery Discharge

Zn + 2MnO₂ + H₂O → ZnO + 2MnOOH

Electrochemical

Electrolytic Manganese Dioxide Production

MnSO₄ + 2H₂O → MnO₂ + H₂SO₄ + H₂

Electrochemical

Compounds Containing Manganese

Potassium Permanganate

KMnO₄

Manganese Dioxide

MnO₂

Lithium Nickel Manganese Cobalt Oxide

LiNi₀.₃₃Mn₀.₃₃Co₀.₃₃O₂

Potassium Permanganate Solution

KMnO₄(aq)

Sodium Permanganate

NaMnO₄

المزيد من فلز انتقالي

21 Sc Scandium 22 Ti Titanium 23 V Vanadium 24 Cr Chromium 26 Fe Iron 27 Co Cobalt 28 Ni Nickel 29 Cu Copper 30 Zn Zinc 39 Y Yttrium

Frequently Asked Questions

What is Manganese?
Manganese (Mn) is a chemical element with atomic number 25. It is a solid at standard temperature and pressure, classified as a فلز انتقالي.
What are the key properties of Manganese?
Manganese has an atomic mass of 54.938 u, density of 7.21 g/cm³, melting point of 1245.8°C, boiling point of 2060.8°C.
What is the electron configuration of Manganese?
The electron configuration of Manganese is [Ar] 3d5 4s2. It is in the d-block of the periodic table.
Who discovered Manganese?
Manganese was discovered by Johan Gottlieb Gahn in 1774.
What is the electronegativity of Manganese?
Manganese has an electronegativity of 1.55 on the Pauling scale.