Molybdenum (Mo)

General Properties

Symbol Mo
Atomic Number 42
Atomic Weight 95.94
Group
6 (chromium family)
VIA (IUPAC), VIB (CAS)
Solid, Paramagnetic, Conductor, Transition Metal, Metal, Stable, Natural
Period 5
Block d

Physical Properties

Density 10.2 g/cm3
Atomic Volume 9.4 cm3/mole
Atomic Radius 1.39 angstroms
Covalent Radius 145 pm
Crust Abundance 0.00011%
Crystal Structure Cubic: Body centered
Color Gray

Energy

Electronegativity 2.2 (Pauling Scale)
Electron Affinity 71.9 kJ/mol
1st Ionization Energy 684 kJ/mol
2nd Ionization Energy 1560 kJ/mol
3rd Ionization Energy 2618 kJ/mol
4th Ionization Energy 4480 kJ/mol
5th Ionization Energy 5257 kJ/mol
6th Ionization Energy 6640.8 kJ/mol
7th Ionization Energy 12125 kJ/mol
8th Ionization Energy 13860 kJ/mol
9th Ionization Energy 15835 kJ/mol
10th Ionization Energy 17980 kJ/mol
11th Ionization Energy 20190 kJ/mol
12th Ionization Energy 22219 kJ/mol
13th Ionization Energy 26930 kJ/mol
14th Ionization Energy 29196 kJ/mol
15th Ionization Energy 52490 kJ/mol
16th Ionization Energy 55000 kJ/mol
17th Ionization Energy 61400 kJ/mol
18th Ionization Energy 67700 kJ/mol
19th Ionization Energy 74000 kJ/mol
20th Ionization Energy 80400 kJ/mol
21st Ionization Energy 87000 kJ/mol
22nd Ionization Energy 93400 kJ/mol
23rd Ionization Energy 98420 kJ/mol
24th Ionization Energy 104400 kJ/mol
25th Ionization Energy 121900 kJ/mol
26th Ionization Energy 127700 kJ/mol
27th Ionization Energy 133800 kJ/mol
28th Ionization Energy 139800 kJ/mol
29th Ionization Energy 148100 kJ/mol
30th Ionization Energy 154500 kJ/mol
Specific Heat Capacity 0.25 J g−1 K−1
Thermal Conductivity 138.0 W·m−1·K−1

Electrons & Oxidation

Oxidation States +6,3,5
Electrons Per Shell 2 8 18 13 1
Electron Configuration [Kr] 4d5 5s1
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s1
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿ 
↿ 
↿ 
↿ 
↿ 
4f
 
 
 
 
 
 
 
5s
↿ 
5p
 
 
 
5d
 
 
 
 
 
5f
 
 
 
 
 
 
 

Nuclear

Radioactive No

Media

Planetary Bohr Model of Molybdenum (Mo)
Description
Hard, silvery-white metal.
Uses
Its alloys are used in aircraft, missiles, and protective coatings in boiler plate.
Sources
Found in the minerals molybdenite (MoS2) and wulfenite (MoO4Pb).
Pronounciation (English)
meh-LIB-deh-nem

Translations

Afrikaans Molibdeen
Aragonese Molibdén
العربية مولبيدنيوم
Armãneashte Molibdenu
asturianu Molibdenu
azərbaycan dili Molibden
български Молибден
বাংলা মলিবডেনাম
brezhoneg Molibden
bosanski Molibden
Byelorussian Малібдэн
Cebuano Molibdeno
čeština Molybden
Chuvash Молибден
Cymraeg Molibdèn
dansk Molybdæn
Deutsch Molybdän
Ελληνικά Μολυβδενιο
English Molybdenum
esperanto Molibdeno
español Molibdeno
eesti Molübdeen
euskara Molibdenoa
فارسی مولیبدن
suomi Molybdeeni
føroyskt Molybden
français Molybdène
furlan Molibden
West-Frysk Molybdeen
Gaeilge Molaibdéineam
Gàidhlig Molaibdeanam
galego Molibdeno
ગુજરાતી મોલિબ્ડેનમનો
Gaelg Molybdenum
Hakka Chinese Muk (鉬)
עברית מוליבדן
हिन्दी मोलिब्डेनम
hrvatski Molibden
magyar Molibdén
հայերեն Մոլիբդեն
Indonesia Molibden
íslenska Mólýbden
italiano Molibdeno
日本語 モリブデン
ქართული მოლიბდენი
کٲشُر Molibdén
қазақ тілі Молибден
한국어 몰리브덴, 2몰리브덴넘
Kurdish Molibden
Komi Молибден
kernewek Molybdenum
кыргызча Молибден
Latin Molybdenum
Lëtzebuergesch Molybdän
Lombard Mulibdéen
lingála Modemu
lietuvių Molibdenas
latviešu Molibdens
Mari Молибден
Maori Molybdenum
македонски Молибден
മലയാളം മൊളിബ്ഡിനം
монгол Молибден
Мокшан Молибден
Bahasa Melayu Molibdenum
Malti Molibdinum, ²Molibdenu
Nahuatl Molibdeno
Nederlands Molybdeen
norsk Molybden
Occitan Molibdèn
ирон Молибден
polski Molibden
português Molibdénio
Runasimi Molibdenu
română Molibden
русский Молибден
slovenčina Molybdén
slovenščina Molibden
Samoan Molibdenimi
Samogitian Muolėbdens
shqip Molibden, ²Molybdeni
српски Молибден
Southern Sotho Molibdenamo
svenska Molybden
Kiswahili Molibdeni
தமிழ் மொலிப்டெனம்
Tajik Молибден
ไทย โมลิบดีนัม
Türkçe Molibden
ئۇيغۇرچە مولبېدىن
українська Молібден
o‘zbek Molibden
Tiếng Việt Molypđen, Molipđen
Võro Molübdeen
中文

History

Discovered In
1781
Discovered By
Carl William Scheele
Discovered At
Sweden
Word Origin
From the Greek word "molybdos" meaning "lead"