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20 Ca Calcium (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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| 20 ____ | |
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| Calcium | |
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| 40.08 u | |
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Wiki Article: Calcium |
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Electron Configuration: [Ar]4s2 |
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Electronegativity: 1 |
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Atomic Radius: 231 pm |
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Ionization Energy: 6.113 eV |
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Electron Affinity: |
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Oxidation States: 2 |
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Standard State: Solid |
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Melting Point: 1115 K |
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Boiling Point: 1757 K |
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Density: 1.54 g/cm3 |
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Family: Alkaline earth metal |
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Year Discovered: Ancient |
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Number of Neutrons: 20 |
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Number of Protons: 20 |
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Number of Electrons: 20 |
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Number of Valence: 2 |
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Valency: 2 |
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Group: 2 |
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Period: 4 |
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Shell: s-shell |
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Specific Heat: 0.647 J/g K |
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Radioactive: 0 |
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Occurrence: Natural |
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Source: Dying high-mass stars |
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Source: White dwarf supernovae |
