francium
英 [ˈfrænsiəm] 美 [ˈfrænsiəm]

n.

（放射性元素）钫（符Fr）；

英英释义

francium[ 'frænsiəm ]

• n.a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

  同义词：Fratomic number 87

权威例句

Francium
francium
francium
Lifetime measurements of the 7 p levels of atomic francium
Spectroscopy with trapped francium: advances and perspectives for weak interaction studies
Hyperfine anomaly measurements in francium isotopes and the radial distribution of neutrons
Enhancement factor for the electron electric dipole moment in francium and gold atoms
Calculation of energy levels, E1 transition amplitudes, and parity violation in francium
SCF Hartree-Fock results for elements with two open shells and the elements francium to nobelium ☆
Relativistic many-body calculations of the hyperfine-structure intervals in caesium and francium atoms