actinium 225 | has symbol 225Ac | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has nuclear spin I = 3/2+ | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has decay mode α (5.935 MeV) | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has decay mode γ | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has half life 10.0 days | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has number of nucleons 225 | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has number of neutrons 136 | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has atomic mass 225.023205 | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
has uses tracer | ![2001-09-27 09:28:35.0 2001-09-27 09:28:35.0](facet.gif) |
is an instance of actinium | ![has URL: http://nucleardata.nuclear.lu.se/nucleardata/toi/nuclide.asp?iZA=890225, 2001-09-27 09:28:35.0 has URL: http://nucleardata.nuclear.lu.se/nucleardata/toi/nuclide.asp?iZA=890225, 2001-09-27 09:28:35.0](facet.gif) |
actinium | has longest lived isotope actinium 227 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has isotope mass range 209 to 232 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has number of isotopes 26 | ![has URL: http://ie.lbl.gov/education/parent/Ac_iso.htm, 2001-09-27 09:28:34.0 has URL: http://ie.lbl.gov/education/parent/Ac_iso.htm, 2001-09-27 09:28:34.0](facet.gif) |
has pronunciation ak-tin-iuhm | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has name origin aktinos from Greek word for 'ray' | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has discovery location Paris, France | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has abundance n.a. in Sun relative to H = 1 × 1012 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has abundance minute traces in Earth's crust | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has abundance nil in seawater | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has specimen not commerecially available | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has world production probably less than a gram | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has chief source uranium ore contain 0.2 p.p.m. | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has mass absorption coefficient cm2 g-1 for CuKα X-ray diffraction | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has mass absorption coefficient cm2 g-1 for MoKα X-ray diffraction | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has space group Fm3m | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has crystal cell dimension a = 531.1 pm | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has crystal type f.c.c. | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 383.312 nm for Ac II | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 408.844 nm for Ac II | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 416.840 nm for Ac II (strong) | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 438.641 nm for Ac II (strong) | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 450.720 nm for Ac II | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic emission line 591.085 nm for Ac II | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has term symbol 2D3/2 in ground state | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has electron configuration [Rn]6d17s2 in ground state | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has mass of element in person nil for a 70 kg average person | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has daily dietary intake nil | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has level in humans nil | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has hazard never encountered normally, dangerous because it is a powerful source of α-radiation, element found only inside nuclear facilities or research laboratories | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has biological role none | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has linear expansion coefficient 14.9 K-1 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has thermal conductivity 12 W m-1 K-1 at 300 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has molar volume 22.6 cm3 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has heat capacity 27.2 J K-1 mol-1 for solid at constant pressure 0.1 MPa at 298.15 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has heat capacity 20.84 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has heat of sublimation 51.9 ± 0.5 kJ mol-1 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has heat of vaporization 418 kJ mol-1 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has heat of fusion 14.2 kJ mol-1 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has boiling point 3470 ± 300 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has melting point 1320 ± 50 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has electronegativity 1.1 Pauling | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has relative atomic mass 227.0728 for 227Ac in units of 12C = 12.000 | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
has ionic radii 118 pm for Ac3+ | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
has atomic radii 188 pm | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
has number of protons 89 | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
has registry number 7440-34-8 for Chemical Abstracts System database | ![has URL: http://info.cas.org, 2001-09-27 09:28:33.0 has URL: http://info.cas.org, 2001-09-27 09:28:33.0](facet.gif) |
has density 10060 kg m-3 for solid at 293 K | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has synthesis mechanism decay of uranium 235 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has synthesis mechanism bombardment of radium 236 with neutrons | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has atomic number 89 | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
reacts with water to release hydrogen gas | ![2001-09-27 09:28:33.0 2001-09-27 09:28:33.0](facet.gif) |
has discovery date 1899 | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has discoverer Andre Debierne | ![2001-09-27 09:28:34.0 2001-09-27 09:28:34.0](facet.gif) |
has image ![](images/element/Ac.jpg) | ![2001-09-27 09:28:32.0 2001-09-27 09:28:32.0](facet.gif) |
actinide | has filling orbital 5f | ![2001-09-27 09:28:22.0 2001-09-27 09:28:22.0](facet.gif) |
radioactive particle | has desintegration energy the total energy produced when the particle decays | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
has decay products the products produced immediately after decay | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
has lifetime The average time in which a particle decays | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
element | is a part of Universe | ![2001-09-27 09:32:17.0 2001-09-27 09:32:17.0](facet.gif) |
has synonym atom | ![2001-09-27 09:28:19.0 2001-09-27 09:28:19.0](facet.gif) |
particle | obeys uncertainty principle | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
has frequency inversely proportional to the wavelength | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
has wavelength inversely proportional to its momentum | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
has charge | ![2001-09-27 09:28:01.0 2001-09-27 09:28:01.0](facet.gif) |
has mass | ![2001-09-27 09:28:02.0 2001-09-27 09:28:02.0](facet.gif) |
column grouped element | has group a column number in the table of the elements | ![2001-09-27 09:28:24.0 2001-09-27 09:28:24.0](facet.gif) |
physical object | has location or center of gravity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has angular momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has velocity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has temperature | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has volume | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has extent | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has material | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |