Americium (Am)
General Properties
| Symbol | Am |
|---|---|
| Atomic Number | 95 |
| Atomic Weight | (243) |
| Group |
(Actinoids)
Solid, Actinide, Radioactive, Synthetic
|
| Period | 7 |
| Block | f |
Physical Properties
| Density | 13.7 g/cm3 |
|---|---|
| Atomic Volume | 20.8 cm3/mole |
| Atomic Radius | 1.84 angstroms |
| Covalent Radius | -- |
| Crust Abundance | None |
| Crystal Structure | Hexagonal |
| Color | Silver |
Energy
| Electronegativity | 1.3 (Pauling Scale) |
|---|---|
| Electron Affinity | -- |
| 1st Ionization Energy | 578 kJ/mol |
| Specific Heat Capacity | J g−1 K−1 |
| Thermal Conductivity | 10.0 W·m−1·K−1 |
Electrons & Oxidation
| Oxidation States | +3,4,5,6 |
|---|---|
| Electrons Per Shell | 2 8 18 32 25 8 2 |
| Electron Configuration | [Rn] 5f7 7s2 |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f7 7s2 | |
|
Orbital Diagram
1s ↿⇂ 2s ↿⇂ 2p ↿⇂ ↿⇂ ↿⇂ 3s ↿⇂ 3p ↿⇂ ↿⇂ ↿⇂ 3d ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ 4s ↿⇂ 4p ↿⇂ ↿⇂ ↿⇂ 4d ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ 4f ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ 5s ↿⇂ 5p ↿⇂ ↿⇂ ↿⇂ 5d ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿⇂ 5f ↿ ↿ ↿ ↿ ↿ ↿ ↿ 6s ↿⇂ 6p ↿⇂ ↿⇂ ↿⇂ 6d 6f 7s ↿⇂ 7p 7d 7f |
|
Nuclear
| Radioactive | Yes |
|---|---|
| Half Life | 7388 y |
| Lifetime | 1.065×104y |
| Decay | Alpha Emission |
Media
- Description
- Silvery-white, artificially produced radioactive metal.
- Uses
- Americium-241 is currently used in smoke detectors.
- Sources
- Produced by bombarding plutonium with neutrons.
- Pronounciation (English)
- am-er-ISH-i-em
Translations
| Afrikaans | Amerikium | |
| Aragonese | Amerizio | |
| العربية | أمريكيوم | |
| Armãneashte | Ameritsiumu | |
| asturianu | Americiu | |
| azərbaycan | Amersium | |
| български | Америций | |
| বাংলা | অ্যামেরিসিয়াম | |
| brezhoneg | Amerikiom | |
| bosanski | Americij[um] | |
| Byelorussian | Амерыцый | |
| Cebuano | Amerisyo | |
| čeština | Americium | |
| Chuvash | Америци | |
| Cymraeg | Americi | |
| dansk | Americium | |
| Deutsch | Amerizium | |
| Ελληνικά | Αμερικιο | |
| English | Americium | |
| esperanto | Americio | |
| español | Amerício | |
| eesti | Ameriitsium | |
| euskara | Amerizioa | |
| فارسی | امریسیم | |
| suomi | Amerikium | |
| føroyskt | Americium | |
| français | Américium | |
| furlan | Americi | |
| Frysk | Americium | |
| Gaeilge | Aimeiriciam | |
| Gàidhlig | Aimeiriciam | |
| galego | Americio | |
| ગુજરાતી | ઍમરિશિયમનો | |
| Gaelg | Americium | |
| Hakka Chinese | Mî (鋂) | |
| עברית | אמריציום | |
| हिन्दी | अमेरिशियम | |
| hrvatski | Americij | |
| magyar | Amerícium | |
| հայերեն | Ամերիցիում | |
| Indonesia | Amerisium | |
| íslenska | Ameríkín | |
| italiano | Americio | |
| 日本語 | アメリシウム | |
| ქართული | ამერიციუმი | |
| کٲشُر | Amerik | |
| қазақ тілі | Америций | |
| 한국어 | 아메리슘 | |
| kurdî | Amerikyûm | |
| Komi | Америций | |
| kernewek | Amerycanyum | |
| кыргызча | Америций | |
| Latin | Americium | |
| Lëtzebuergesch | Amerizium | |
| Lombard | Ameríci | |
| lingála | Amelu | |
| lietuvių | Americis | |
| latviešu | Amerīcijs | |
| Mari | Америций | |
| Māori | Americium | |
| македонски | Америциум | |
| മലയാളം | അമെരിസിയം | |
| монгол | Америци | |
| Мокшан | Америки | |
| Melayu | Amerisium | |
| Malti | Amerizjum, ²Ameriċju | |
| Nahuatl | Americio | |
| Nederlands | Americium | |
| norsk | Americium | |
| Occitan | Americi | |
| ирон | Америций | |
| polski | Ameryk | |
| português | Amerício | |
| Runasimi | Amerisyu | |
| română | Americiu | |
| русский | Америций | |
| slovenčina | Americium | |
| slovenščina | Americij | |
| Samoan | Amerikimi | |
| Samogitian | Amerėcis | |
| shqip | Americ[iumi] | |
| српски | Америцијум | |
| Southern Sotho | Amerikiamo | |
| svenska | Americium | |
| Kiswahili | Ameriki | |
| தமிழ் | அமெரிகியம் | |
| тоҷикӣ | Америтсий | |
| ไทย | อะเมริเซียม | |
| Türkçe | Amerikyum | |
| ئۇيغۇرچە | ئامېرىتسىي | |
| українська | Америцій | |
| o‘zbek | Ameritsiy | |
| Tiếng Việt | Amerixi | |
| Võro | Ameriitsium | |
| 中文 | 鎇 |
History
- Discovered In
- 1944
- Discovered By
- Glenn Seaborg, Ralph James., L. Morgan, Albert Ghiorso
- Discovered At
- USA
- Word Origin
- From the English word "America"