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physical object > natural object > collection of particles > phase of matter > solid > metal > actinide > actinium |
actinium (Ac, Ac, 2D3/2 in ground state) | ||||
subject | fact |
actinium | has symbol Ac | |
has symbol Ac | ||
has longest lived isotope actinium 227 | ||
has isotope mass range 209 to 232 | ||
has number of isotopes 26 | ||
has pronunciation ak-tin-iuhm | ||
has name origin aktinos from Greek word for 'ray' | ||
has discovery location Paris, France | ||
has abundance n.a. in Sun relative to H = 1 × 1012 | ||
has abundance minute traces in Earth's crust | ||
has abundance nil in seawater | ||
has specimen not commerecially available | ||
has world production probably less than a gram | ||
has chief source uranium ore contain 0.2 p.p.m. | ||
has mass absorption coefficient cm2 g-1 for CuKα X-ray diffraction | ||
has mass absorption coefficient cm2 g-1 for MoKα X-ray diffraction | ||
has space group Fm3m | ||
has crystal cell dimension a = 531.1 pm | ||
has crystal type f.c.c. | ||
has atomic emission line 383.312 nm for Ac II | ||
has atomic emission line 408.844 nm for Ac II | ||
has atomic emission line 416.840 nm for Ac II (strong) | ||
has atomic emission line 438.641 nm for Ac II (strong) | ||
has atomic emission line 450.720 nm for Ac II | ||
has atomic emission line 591.085 nm for Ac II | ||
has term symbol 2D3/2 in ground state | ||
has electron configuration [Rn]6d17s2 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 never encountered normally, dangerous because it is a powerful source of α-radiation, element found only inside nuclear facilities or research laboratories | ||
has biological role none | ||
has linear expansion coefficient 14.9 K-1 | ||
has thermal conductivity 12 W m-1 K-1 at 300 K | ||
has molar volume 22.6 cm3 | ||
has heat capacity 27.2 J K-1 mol-1 for solid at constant pressure 0.1 MPa at 298.15 K | ||
has heat capacity 20.84 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K | ||
has heat of sublimation 51.9 ± 0.5 kJ mol-1 | ||
has heat of vaporization 418 kJ mol-1 | ||
has heat of fusion 14.2 kJ mol-1 | ||
has boiling point 3470 ± 300 K | ||
has melting point 1320 ± 50 K | ||
has electronegativity 1.1 Pauling | ||
has relative atomic mass 227.0728 for 227Ac in units of 12C = 12.000 | ||
has ionic radii 118 pm for Ac3+ | ||
has atomic radii 188 pm | ||
has number of protons 89 | ||
has registry number 7440-34-8 for Chemical Abstracts System database | ||
has density 10060 kg m-3 for solid at 293 K | ||
has synthesis mechanism decay of uranium 235 | ||
has synthesis mechanism bombardment of radium 236 with neutrons | ||
has atomic number 89 | ||
reacts with water to release hydrogen gas | ||
has discovery date 1899 | ||
has discoverer Andre Debierne | ||
has image | ||
has definition soft, silvery-white, radioactive metal which glows in the dark | ||
is a kind of actinide | ||
is a kind of radioactive element | ||
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 actinium :
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