Properties of Known and Unknown Elements, Cheat Sheet of Earth science

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Known Element A Known Element B Standard state: Solid Electronegativity: 0.98 Standard state: Solid | Electronegativity: 1.57 Atomic mass (u): 7.0 |lonization energy (eV): 5.39 Atomic mass (u): 9.01 |lonization energy (eV): 9.32 Atomic radius (pm): 182 |Electron affinity (eV): 0.62 Atomic radius (pm): 153 | Electron affinity (eV): -0.5 Valence electrons: 1 Formula of chloride: XCl Valence electrons: 2 Formula of chloride: XClyo Melting point (K): 454 |Formula of oxide: X20 Melting point (K): 1560 | Formula of oxide: XO Boiling point (K): 1615 |Formula of hydride: XH Boiling point (kK): 2744 |Formula of hydride: XHo Density (g/cm$): 0.53 | Reactivity: Water (low) Density (g/cm9): 1.85 | Reactivity: Acids (low) Known Element C Known Element D Standard state: Gas__|Electronegativity: Standard state: Gas__|Electronegativity: 3.98 Atomic mass (u): 20.18 |lonization energy (eV): | 21.57 Atomic mass (u): 18.99 |lonization energy (eV): 17.42 Atomic radius (pm): 154 |Electron affinity (eV): “1.2 Atomic radius (pm): 135 |Electron affinity (eV): 3.34 Valence electrons: 8 Formula of chloride: Valence electrons: 7 Formula of chloride: XCl Melting point (K): 25 Formula of oxide: Melting point (K): 54 Formula of oxide: X20 Boiling point (K): 27 Formula of hydride: - Boiling point (K): 85 Formula of hydride: XH Density (g/cm): 0.00089 |Reactivity: None Density (g/cm): 0.0017 | Reactivity: - Known Element E Known Element F Standard state: Gas_ |Electronegativity: 3.44 Standard state: Gas_ | Electronegativity: 3.04 Atomic mass (u): 15.99 |lonization energy (eV): 13.62 Atomic mass (u): 14.00 |lonization energy (eV): 14.53 Atomic radius (pm): 152 |Electron affinity (eV): 1.46 Atomic radius (pm): 155 | Electron affinity (eV): 1.46 Valence electrons: 6 Formula of chloride: XCly Valence electrons: 5 Formula of chloride: XCl3 Melting point (K): 54 Formula of oxide: xO Melting point (K): 63 Formula of oxide: X05 Boiling point (K): 90 Formula of hydride: XH Boiling point (K): 77 Formula of hydride: XH3 Density (g/cm): 0.0014 | Reactivity: - Density (g/cm): 0.0012 |Reactivity: - Known Element G Known Element H Standard state: Solid | Electronegativity: 2.55 Standard state: Solid | Electronegativity: 2.04 Atomic mass (u): 12.01 |lonization energy (eV): 14.53 Atomic mass (u): 10.81 |lonization energy (eV): 8.29 Atomic radius (pm): 170 |Electron affinity (eV): 1.26 Atomic radius (pm): 192 |Electron affinity (eV): 0.28 Valence electrons: 4 Formula of chloride: XC Valence electrons: 3 Formula of chloride: XCl3 Melting point (K): 3823 |Formula of oxide: XOy Melting point (K): 2348 |Formula of oxide: X203 Boiling point (K): 4098 |Formula of hydride: XH, Boiling point (K): 4273 |Formula of hydride: XH3 Density (g/cm): 2.27 |Reactivity: - Density (g/cm?): 2.37 | Reactivity: - Known Element Q Known Element R Standard state: Solid |Electronegativity: 0.82 Standard state: Solid |Electronegativity: 1 Atomic mass (u): 39.09 |lonization energy (eV): 4.34 Atomic mass (u): 40.08 |lonization energy (eV): 6.11 Atomic radius (pm): 275 |Electron affinity (eV): 0.5 Atomic radius (pm): 231 Electron affinity (eV): 0.5 Valence electrons: 1 Formula of chloride: XCl Valence electrons: 2 Formula of chloride: XCly Melting point (K): 337 | Formula of oxide: X20 Melting point (K): 1115 |Formula of oxide: XO Boiling point (K): 1032 |Formula of hydride: XH Boiling point (K): 1757 |Formula of hydride: XH Density (g/cm): 0.89 |Reactivity: Water (high) Density (g/cm?): 1.54 |Reactivity: Acids (high) Known Element S Known Element T Standard state: Gas_ | Electronegativity: 3 Standard state: Liquid |Electronegativity: 2.96 Atomic mass (u): 83.80 |lonization energy (eV): 14.0 Atomic mass (u): 79.90 |lonization energy (eV): 11.81 Atomic radius (pm): 202 |Electron affinity (eV): -1.0 Atomic radius (pm): 183 | Electron affinity (eV): 3.37 Valence electrons: 8 Formula of chloride: - Valence electrons: 7 Formula of chloride: XCl Melting point (K): 116 |Formula of oxide: - Melting point (K): 266 = |Formula of oxide: X20 Boiling point (K): 120 |Formula of hydride: - Boiling point (K): 332 |Formula of hydride: XH Density (g/cm): 0.0037 |Reactivity: - Density (g/cm): 3.11 |Reactivity: - Known Element U Known Element V Standard state: Solid |Electronegativity: 2.18 Standard state: Solid | Electronegativity: 2.01 Atomic mass (u): 74.92 |lonization energy (eV): 9.82 Atomic mass (u): 72.63 |lonization energy (eV): 7.90 Atomic radius (pm): 185 |Electron affinity (eV): 0.81 Atomic radius (pm): 211 Electron affinity (eV): 1.35 Valence electrons: 5 Formula of chloride: XClg Valence electrons: 4 Formula of chloride: XC Melting point (K): 1090 | Formula of oxide: Xo05 Melting point (K): 1211 |Formula of oxide: XO. Boiling point (K): 887 | Formula of hydride: XH3 Boiling point (K): 3106 |Formula of hydride: XH4 Density (g/cm9): 5.78 |Reactivity: - Density (g/cm): 5.32 |Reactivity: - Known Element W Known Element X Standard state: Solid |Electronegativity: 1.81 Standard state: Solid |Electronegativity: 0.95 Atomic mass (u): 69.72 |lonization energy (eV): 5.99 Atomic mass (u): 87.6 |lonization energy (eV): 5.69 Atomic radius (pm): 187 |Electron affinity (eV): 0.3 Atomic radius (pm): 249 |Electron affinity (eV): 0.05 Valence electrons: 3 Formula of chloride: XClg Valence electrons: 2 Formula of chloride: XCly Melting point (K): 303 |Formula of oxide: X,03 Melting point (K): 1050 | Formula of oxide: XO Boiling point (K): 2477 |Formula of hydride: XH3 Boiling point (K): 1655 | Formula of hydride: XH» Density (g/cm): 5.91 |Reactivity: - Density (g/cm): 2.64 |Reactivity: Acid (very high) Known Element Y Known Element Z Standard state: Gas Electronegativity: 2.6 Standard state: Solid |Electronegativity: 2.66 Atomic mass (u): 131.29 |lonization energy (eV): 12.13 Atomic mass (u): 126.90 |lonization energy (eV): 10.45 Atomic radius (pm): 216 |Electron affinity (eV): -0.8 Atomic radius (pm): 198 | Electron affinity (eV): 3.06 Valence electrons: 8 Formula of chloride: - Valence electrons: 7 Formula of chloride: XCl Melting point (K): 161 Formula of oxide: - Melting point (K): 387 |Formula of oxide: X20 Boiling point (K): 165 |Formula of hydride: - Boiling point (K): 458 |Formula of hydride: XH Density (g/cm): 0.0058 |Reactivity: - Density (g/cm): 4.93 |Reactivity: - Known Element AA Known Element BB Standard state: Solid |Electronegativity: 2.05 Standard state: Solid |Electronegativity: 1.96 Atomic mass (u): 121.76 |lonization energy (eV): 8.64 Atomic mass (u): 118.71 |lonization energy (eV): 217 Atomic radius (pm): 206 |Electron affinity (eV): 1.07 Atomic radius (pm): 217 |Electron affinity (eV): 7.34 Valence electrons: 5 Formula of chloride: XCly Valence electrons: 4 Formula of chloride: XCly Melting point (K): 904 |Formula of oxide: X05 Melting point (K): 505 |Formula of oxide: XO. Boiling point (K): 1860 |Formula of hydride: XH3 Boiling point (K): 2875 |Formula of hydride: XH4 Density (g/cm): 6.69 |Reactivity: - Density (g/cm): 7.29 |Reactivity: Acids (low)