Hydrogen vs Praseodymium
Side-by-side comparison of Hydrogen (H, element 1) and Praseodymium (Pr, element 59) by atomic structure and physical properties.
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| Atomic number | 1 | 59 |
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| Symbol | H | Pr |
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| Name | Hydrogen | Praseodymium |
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| Category | nonmetal | lanthanide |
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| Standard Atomic Weight | 1.007975 u | 140.90766 u |
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| Period | 1 | 6 |
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| Group | 1 | N/A |
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| Block | s | f |
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| Phase at STP | Gas | Solid |
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| Electron configuration | 1s1 | [Xe]6s24f3 |
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| Oxidation states | [-1, 1] | [0, 1, 2, 3, 4, 5] |
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| Electronegativity (Pauling) | 2.2 | 1.13 |
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| Electron affinity | 0.75419 eV | 0.962 eV |
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| Density | 0.08988 kg/m³ | 6770 kg/m³ |
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| Melting point | -259.193 °C | 930.85 °C |
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| Boiling point | -252.781 °C | 3519.85 °C |
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| Discovery year | 1766 | 1885 |
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Key Differences
| H Hydrogen | Pr Praseodymium |
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| Standard Atomic Weight | 1.007975 u ↓ lower | 140.90766 u ↑ higher |
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| Density | 0.08988 kg/m³ ↓ lower | 6770 kg/m³ ↑ higher |
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| Melting point | -259.193 °C ↓ lower | 930.85 °C ↑ higher |
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| Boiling point | -252.781 °C ↓ lower | 3519.85 °C ↑ higher |
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| Electronegativity (Pauling) | 2.2 ↑ higher | 1.13 ↓ lower |
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| Electron affinity | 0.75419 eV ↓ lower | 0.962 eV ↑ higher |
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| Period | 1 | 6 |
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| Block | s | f |
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| Category | nonmetal | lanthanide |
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| Phase at STP | Gas | Solid |
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| Electron configuration | 1s1 | [Xe]6s24f3 |
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| Discovery year | 1766 | 1885 |
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