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physical object > natural object > collection of particles > phase of matter > solid > metal > actinide > transuranium element > americium |
americium (Am, 8S7/2 in ground state) | ||||
subject | fact |
americium | has symbol Am | |
has phase changed temperature 1347 K at α to β phase crystal transition | ||
has mineral none | ||
has neutron scattering length 0.83 in 10-12 cm units | ||
has mass magnetic susceptibility +5 × 10-8 kg-1 m3 | ||
has electrical resistivity 68 × 10-8 Ω m | ||
has thermal neutron capture cross section 75.3 barns | ||
has longest lived isotope americium 243 | ||
has isotope mass range 227 to 247 | ||
has number of isotopes 23 including nuclear isomers | ||
has pronunciation amer-is-iuhm | ||
has name origin america from English | ||
has discovery location Chicago, Illinois, US | ||
has abundance nil in Earth's crust | ||
has abundance nil in seawater | ||
has world production probably a few kilograms per year | ||
has space group P63/mmc for α phase | ||
has space group Fm3m for β phase | ||
has crystal cell dimension a = 346.80 pm for α phase | ||
has crystal cell dimension a = 489.4 pm for β phase | ||
has crystal type h.c.p. for α phase | ||
has crystal type f.c.c. for β phase | ||
has atomic emission line 367.312 nm for Am I | ||
has atomic emission line 377.750 nm for Am II | ||
has atomic emission line 392.625 nm for Am II | ||
has atomic emission line 408.929 nm for Am II | ||
has atomic emission line 428.926 nm for Am I | ||
has atomic emission line 450.945 nm for Am II | ||
has atomic emission line 457.559 nm for Am II | ||
has atomic emission line 466.279 nm for Am II | ||
has atomic emission line 605.464 nm for Am I (strong) | ||
has term symbol 8S7/2 in ground state | ||
has electron configuration [Rn]5f77s2 in ground state | ||
has mass of element in person nil for a 70 kg average person | ||
has daily dietary intake nil | ||
has level in humans nil | ||
has hazard intense α-radiation, maximum permissible body burden of 241Am is 0.03 μCi - it targets bone. γ radiation is a problem in gram amounts. | ||
has biological role none | ||
has thermal conductivity 10 W m-1 K-1 at 300 K | ||
has molar volume 17.78 cm3 | ||
has heat of sublimation 34.2 kJ mol-1 | ||
has heat of vaporization 284 kJ mol-1 | ||
has heat of fusion 14.4 kJ mol-1 | ||
has boiling point 2880 K | ||
has melting point 1445 K | ||
has electronegativity 1.3 Pauling | ||
has relative atomic mass 243.0614 for americium 243 in units of 12C = 12.000 | ||
has ionic radii 80 pm for Am6+ | ||
has ionic radii 86 pm for Am5+ | ||
has ionic radii 92 pm for Am4+ | ||
has ionic radii 107 pm for Am3+ | ||
has atomic radii 173 pm | ||
has number of protons 95 | ||
has registry number 7440-35-9 for Chemical Abstracts System database | ||
has density 13670 kg m-3 for solid at 293 K | ||
has atomic number 95 | ||
reacts with air, steam and acids, but not alkalis | ||
has discovery date 1944 | ||
has discoverer Glen T. Seaborg, R.A. James, L.O. Morgan, and A. Ghiorso | ||
has uses source of radiation for γ-radiotherapy | ||
has image | ||
has definition radioactive silvery metal which does not occur naturally | ||
is a kind of transuranium element | ||
is a kind of radioactive element | ||
synthetic element | has lifetime | |
has synthesis mechanism | ||
actinide | has filling orbital 5f | |
radioactive particle | has desintegration energy the total energy produced when the particle decays | |
has decay products the products produced immediately after decay | ||
has lifetime The average time in which a particle decays | ||
element | is a part of Universe | |
has synonym atom | ||
particle | obeys uncertainty principle | |
has frequency inversely proportional to the wavelength | ||
has wavelength inversely proportional to its momentum | ||
has charge | ||
has mass | ||
column grouped element | has group a column number in the table of the elements | |
physical object | has location or center of gravity | |
has angular momentum | ||
has velocity | ||
has momentum | ||
has temperature | ||
has volume | ||
has extent | ||
has material |
Kinds of americium :
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