Bailey Alwin Period 7 12/16/14

Periodic table information

  1. Symbol: Mn

  2. Atomic number: 25

  3. Atomic mass: 54.938045

Big image

Family, Group, Period

Family: Transition Metals

Group: 7

Period: 4

Big image
Big image

Atomic Number, Atomic Mass

  1. Atomic number: 25

  2. Atomic mass: 54.938045

Number of Protons, neutrons, electrons

Protons- 25

Neutrons- 30

Electrons- 25

Physical Properties

Melting Point: 1519 [1246 °C (2275 °F)] K

Boiling Point: 2334 [2061 °C (3742 °F)] K

Density of solid: 7470 kg m‑

Chemical Properties

Manganese has the valence of 1,2,3,4,6, or 7. Ordinary manganese is a hard and brittle gray-white metal. It can slowly decomposes cold water. It is also chemically reactive.

Where was it discovered and by who?

Johan Gottlieb Gahn and Ignatius Gottfried Kaim discovered manganese on 1774 by heating the mineral pyrolusite (MnO2) in the presence of charcoal later that year.
Big image

Where is it found in nature?

Manganese is not found in nature as a free metal. Manganese minerals consisting of oxides, silicates, and carbonates are common. Manganese is obtained from ores in Australia, Brazil, Gabon, India, Russia, and South Africa. Manganese nodules on ocean floors holds contain about 24% manganese.

References ¨MLA¨

"Manganese: The Essentials." WebElements Periodic Table»Manganese»the Essentials. Web. 17 Dec. 2014. <>.

"Chemical - Manganese (Mn)." Chemical - Manganese (Mn). Web. 17 Dec. 2014. <>.

"Chemistry Explained." Manganese, Chemical Element. Web. 17 Dec. 2014. <>.

"Dynamic Periodic Table." Dynamic Periodic Table. Web. 17 Dec. 2014. <>.

"Museum-grade Sample, a Sample of the Element Manganese in the Periodic Table." Museum-grade Sample, a Sample of the Element Manganese in the Periodic Table. Web. 17 Dec. 2014. <>.

Helmenstine, Todd. "Johan Gottlieb Gahn Biography." Web. 17 Dec. 2014. <>.

Helmenstine, Ph.D. "Manganese Facts - Periodic Table of the Elements." Web. 17 Dec. 2014. <>.

"Transition Metals." Transition Metals. Web. 17 Dec. 2014. <>.