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57 La Lanthanum (plaintext) |
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H He |
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Li Be B C N O F Ne |
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Na Mg Al Si P S Cl Ar |
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K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr |
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Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe |
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Cs Ba[La]Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn |
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Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og |
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Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu |
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Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr |
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| 57 _ | |
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| | | __ _ | |
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| | | / _` | | |
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| | |__| (_| | | |
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| |_____\__,_| | |
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| Lanthanum | |
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| 138.9055 u | |
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Wiki Article: Lanthanum |
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Electron Configuration: [Xe]6s2 5d1 |
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Electronegativity: 1.1 |
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Atomic Radius: 240 pm |
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Ionization Energy: 5.577 eV |
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Electron Affinity: 0.5 eV |
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Oxidation States: 3 |
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Standard State: Solid |
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Melting Point: 1191 K |
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Boiling Point: 3737 K |
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Density: 6.15 g/cm3 |
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Family: Lanthanide |
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Year Discovered: 1839 |
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Number of Neutrons: 82 |
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Number of Protons: 57 |
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Number of Electrons: 57 |
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Number of Valence: |
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Valency: |
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Group: 3 |
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Period: 6 |
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Shell: f-shell |
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Specific Heat: 0.195 J/g K |
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Radioactive: 0 |
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Occurrence: Natural |
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Source: Dying low-mass stars |
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Source: Merging neutron stars |
