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Atomic weight
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Atomic volume
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discovered
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state (s, l, g)
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melting point
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boiling point
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electronegativity
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electron affinity
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Shells
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electron configuration
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structure
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uses
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hardness
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characteristics
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reaction with air
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number of isotopes
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hydride(s)
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oxide(s)
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chloride(s)
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image
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thermal conductivity
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electrical conductivity
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polarizability
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source
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abundance earth's crust
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cost, pure
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cost, bulk
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rel. abund. solar system
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Density @ 293 K
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| Cesium(Cs) | 132.905 | 71.07 (cm3/mol) | 11/30/1859 | s | 301.6 (K) | 978 (K) | .79 | 45.506 (kJ/mole) | 2,8,18,18,8,1 | [Xe] 6s1 | bcc: body-centered cubic | photocells, IR lamps | .2 (mohs) | softest metal | vigorous, =>CsO2 | 1 | CsH | Cs2O | CsCl |  | 35.9 J/m-sec-deg | 48.9 1/mohm-cm | 59.6 (A^3) | Li extractn by-product | (log) | 1100 $/100g | $/100g | - (-) | 1 (1) |
| Francium(Fr) | ... | ... | 11/30/1938 | s | 300.2 (K) | ... | .7 | ... | 2,8,18,32,18,8,1 | [Rn] 7s1 | ... | ... | ... | Radioactive | ... | 1 | ... | ... | ... |  | J/m-sec-deg | 1/mohm-cm | 48.7 (A^3) | Synthetic(U-235 decay) | ... | $/100g | $/100g | l (l) | ... |
| Lithium(Li) | 6.94 | 13.1 (cm3/mol) | 11/30/1816 | s | 453.74 (K) | 1,620 (K) | .98 | 59.63 (kJ/mole) | 2,1 | [He] 2s1 | bcc: body-centered cubic | batteries, lubricant | .6 (mohs) | soft, lightest solid | vigorous, =>Li2O | 2 | LiH | Li2O | LiCl |  | 84.8 J/m-sec-deg | 107.8 1/mohm-cm | 24.3 (A^3) | Spodumene (silicate) | 1.3 (log) | 27 $/100g | $/100g | 1 (1) | 0 |
| Potassium(K) | 39.098 | 45.46 (cm3/mol) | 11/30/1806 | s | 336.5 (K) | 1,038.7 (K) | .82 | 48.385 (kJ/mole) | 2,8,8,1 | [Ar] 4s1 | bcc: body-centered cubic | fertilizer, low-Na salt | .5 (mohs) | soft | vigorous, =>KO2 | 3 | KH | K2O | KCl |  | 102.5 J/m-sec-deg | 138.9 1/mohm-cm | 43.4 (A^3) | Sylvite, carnallite (misc) | 4.3 (log) | 85 $/100g | $/100g | 3 (3) | 0 |
| Rubidium(Rb) | 85.467 | 55.9 (cm3/mol) | 11/30/1860 | s | 312.09 (K) | 961 (K) | .82 | 46.885 (kJ/mole) | 2,8,18,8,1 | [Kr] 5s1 | bcc: body-centered cubic | photocells | .3 (mohs) | soft | vigorous, =>RbO2 | 2 | RbH | Rb2O | RbCl |  | 58.2 J/m-sec-deg | 77.9 1/mohm-cm | 47.3 (A^3) | Li extractn by-product | 2 (log) | 1200 $/100g | $/100g | 0 | 1 (1) |
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