Manganese

By Laiba Sarwar

Symbol: Mn Atomic Number: 25 Atomic Mass : 54.94 Group Number: 07 Period: 04 Block: d Isotopes: 03

INTRODUCTION

Derived from Latin Word “Magnes” meaning Magnet. Discovered by “Scheele” and isolated by “Gahn” In 1774. Manganese in form of black ore was used by pre historic cave

painters in France around 30,000 years ago.

History of Manganese

• It is hard, brittle silvery Metal.• Form 0.09% of the Earth’s crust.• 5th Most abundant element.• Boiling point: 2061˚C.• Melting point: 1246˚C.

• Image: Electromagnet and a Cow.

Physical Properties

• Ocean Floor.• Whole Grains and Vegetables.• Drinking Water.• Rocks And Soils.• 80 % of Mn resources present in South Africa, America, Brazil.

Sources of Manganese

• With Water• With Air• With Acids• With Halogens• With Bases

Reaction in Environment

• Manganese has tendency to accumulate in shell fish and some plants.• Inhalation of Air containing high level of

manganese causes Hallucination, Weakness, speech problem, Headache.

• Along with Lead Manganese go through combustion process and cause pollution in Environment.

Manganese As Pollutant

• Steel Production• In Gasoline ᶓ Alkaline Batteries.• Colorless glass making.• In Paints, Lip glows• In Dry cell Batteries.• Alloy Formation.• Water Purification

Uses Of Manganese

Health Benefits Of Manganese

Healthy bonesMaintain Sugar

levelControl Epileptic

seizure

Regulate Metabolism

Prevent Osteoporosis and Sprain

Treat PMS Syndrome

Essential For Thyroid

• Scientist have discovered that Manganese cause disintegration of Shiga toxin in cells.

Latest Research On Manganese