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helium vs xenon vs xenon

Input interpretation

helium (chemical element) | xenon (chemical element)
helium (chemical element) | xenon (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| helium | xenon atomic symbol | He | Xe atomic number | 2 | 54 short electronic configuration | 1s^2 | [Kr]5s^24d^105p^6 Aufbau diagram | 1s | 5p 4d 5s block | s | p group | 18 | 18 period | 1 | 5 atomic mass | 4.002602 u | 131.293 u half-life | (stable) | (stable)
| helium | xenon atomic symbol | He | Xe atomic number | 2 | 54 short electronic configuration | 1s^2 | [Kr]5s^24d^105p^6 Aufbau diagram | 1s | 5p 4d 5s block | s | p group | 18 | 18 period | 1 | 5 atomic mass | 4.002602 u | 131.293 u half-life | (stable) | (stable)

Thermodynamic properties

| helium | xenon phase at STP | gas | gas melting point | | -111.8 °C boiling point | -268.93 °C | -108 °C critical temperature | 5.19 K | 289.77 K critical pressure | 0.227 MPa | 5.841 MPa molar heat of fusion | 0.02 kJ/mol | 2.3 kJ/mol molar heat of vaporization | 0.083 kJ/mol | 12.64 kJ/mol specific heat at STP | 5193.1 J/(kg K) | 158.32 J/(kg K) adiabatic index | 5/3 | 5/3 (properties at standard conditions)
| helium | xenon phase at STP | gas | gas melting point | | -111.8 °C boiling point | -268.93 °C | -108 °C critical temperature | 5.19 K | 289.77 K critical pressure | 0.227 MPa | 5.841 MPa molar heat of fusion | 0.02 kJ/mol | 2.3 kJ/mol molar heat of vaporization | 0.083 kJ/mol | 12.64 kJ/mol specific heat at STP | 5193.1 J/(kg K) | 158.32 J/(kg K) adiabatic index | 5/3 | 5/3 (properties at standard conditions)

Material properties

| helium | xenon density | 1.785×10^-4 g/cm^3 | 0.0059 g/cm^3 molar volume | 22420 cm^3/mol | 22000 cm^3/mol refractive index | 1.000035 | 1.000702 sound speed | 970 m/s | 1090 m/s thermal conductivity | 0.1513 W/(m K) | 0.00565 W/(m K) (properties at standard conditions)
| helium | xenon density | 1.785×10^-4 g/cm^3 | 0.0059 g/cm^3 molar volume | 22420 cm^3/mol | 22000 cm^3/mol refractive index | 1.000035 | 1.000702 sound speed | 970 m/s | 1090 m/s thermal conductivity | 0.1513 W/(m K) | 0.00565 W/(m K) (properties at standard conditions)

Electromagnetic properties

| helium | xenon magnetic type | diamagnetic | diamagnetic volume magnetic susceptibility | -1.05×10^-9 | -2.54×10^-8 mass magnetic susceptibility | -5.9×10^-9 m^3/kg (cubic meters per kilogram) | -4.3×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -2.36×10^-11 m^3/mol (cubic meters per mole) | -5.65×10^-10 m^3/mol (cubic meters per mole) color | (colorless) | (colorless) refractive index | 1.000035 | 1.000702
| helium | xenon magnetic type | diamagnetic | diamagnetic volume magnetic susceptibility | -1.05×10^-9 | -2.54×10^-8 mass magnetic susceptibility | -5.9×10^-9 m^3/kg (cubic meters per kilogram) | -4.3×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -2.36×10^-11 m^3/mol (cubic meters per mole) | -5.65×10^-10 m^3/mol (cubic meters per mole) color | (colorless) | (colorless) refractive index | 1.000035 | 1.000702

Reactivity

| helium | xenon valence | 0 | 6 electronegativity | | 2.6 electron affinity | 0 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) first ionization energy | 2372.3 kJ/mol (kilojoules per mole) | 1170.4 kJ/mol (kilojoules per mole) ionization energies | 2372.3 kJ/mol | 5250.5 kJ/mol | 1170.4 kJ/mol | 2046.4 kJ/mol | 3099.4 kJ/mol
| helium | xenon valence | 0 | 6 electronegativity | | 2.6 electron affinity | 0 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) first ionization energy | 2372.3 kJ/mol (kilojoules per mole) | 1170.4 kJ/mol (kilojoules per mole) ionization energies | 2372.3 kJ/mol | 5250.5 kJ/mol | 1170.4 kJ/mol | 2046.4 kJ/mol | 3099.4 kJ/mol
Reactivity
Reactivity

Atomic properties

| helium | xenon term symbol | ^1S_0 | ^1S_0 atomic radius | 31 pm | 108 pm covalent radius | 28 pm | 140 pm van der Waals radius | 140 pm | 216 pm (electronic ground state properties)
| helium | xenon term symbol | ^1S_0 | ^1S_0 atomic radius | 31 pm | 108 pm covalent radius | 28 pm | 140 pm van der Waals radius | 140 pm | 216 pm (electronic ground state properties)

Abundances

| helium | xenon universe abundance | 23 mass% | 1×10^-6 mass% solar abundance | 23 mass% | crust abundance | 5.5×10^-7 mass% | 2×10^-9 mass% ocean abundance | 7.2×10^-10 mass% | 5×10^-10 mass% universe molar abundance | 7.2 mol% | 9×10^-9 mol% solar molar abundance | 7.4 mol% | ocean molar abundance | 1.1×10^-9 mol% | 2.4×10^-11 mol% crust molar abundance | 3×10^-6 mol% | 3×10^-10 mol%
| helium | xenon universe abundance | 23 mass% | 1×10^-6 mass% solar abundance | 23 mass% | crust abundance | 5.5×10^-7 mass% | 2×10^-9 mass% ocean abundance | 7.2×10^-10 mass% | 5×10^-10 mass% universe molar abundance | 7.2 mol% | 9×10^-9 mol% solar molar abundance | 7.4 mol% | ocean molar abundance | 1.1×10^-9 mol% | 2.4×10^-11 mol% crust molar abundance | 3×10^-6 mol% | 3×10^-10 mol%

Nuclear properties

| helium | xenon half-life | (stable) | (stable) stable isotopes | He-4 (99.999863%) | He-3 (1.37×10^-6) | Xe-132 (26.909%) | Xe-129 (26.4%) | Xe-131 (21.232%) | Xe-134 (10.436%) | Xe-136 (8.857%) | Xe-130 (4.071%) | Xe-128 (1.91%) | Xe-124 (9.5×10^-4) | Xe-126 (8.9×10^-4) nuclear spin | He-3: 1/2^+ | He-4: 0^+ | He-5: 3/2^- | He-6: 0^+ | He-7: 3/2^- | He-8: 0^+ | He-9: 1/2^+ | He-10: 0^+ | Xe-110: 0^+ | Xe-111: 5/2^+ | Xe-112: 0^+ | Xe-113: 5/2^+ | Xe-114: 0^+ | Xe-115: 5/2^+ | Xe-116: 0^+ | Xe-117: 5/2^+ | Xe-118: 0^+ | Xe-119: 5/2^+ | Xe-120: 0^+ | Xe-121: 5/2^+ | Xe-122: 0^+ | Xe-123: 1/2^+ | Xe-124: 0^+ | Xe-125: 1/2^+ | Xe-126: 0^+ | Xe-127: 1/2^+ | Xe-128: 0^+ | Xe-129: 1/2^+ | Xe-130: 0^+ | Xe-131: 3/2^+ | Xe-132: 0^+ | Xe-133: 3/2^+ | Xe-134: 0^+ | Xe-135: 3/2^+ | Xe-136: 0^+ | Xe-137: 7/2^- | Xe-138: 0^+ | Xe-139: 3/2^- | Xe-140: 0^+ | Xe-141: 5/2^- | Xe-142: 0^+ | Xe-143: 5/2^- | Xe-144: 0^+ | Xe-145: 3/2^- | Xe-146: 0^+ | Xe-147: 3/2^- unstable isotopes | He-6 (806.7 ms) | He-8 (119 ms) | He-9 (7 zs) | He-7 (3.04 zs) | He-10 (1.52 zs) | He-5 (0.76 zs) | Xe-127 (36.345 days) | Xe-133 (125.8 h) | Xe-122 (20.1 h) | Xe-125 (16.9 h) | Xe-135 (9.14 h) | Xe-123 (124.8 min) | Xe-121 (40.17 min) | Xe-120 (40 min) | Xe-138 (14.08 min) | Xe-119 (5.83 min) | Xe-118 (230 s) | Xe-137 (229.1 s) | Xe-117 (61 s) | Xe-116 (59 s) | Xe-139 (39.68 s) | Xe-115 (18 s) | Xe-140 (13.6 s) | Xe-114 (10 s) | Xe-113 (2.74 s) | Xe-112 (2.7 s) | Xe-141 (1.73 s) | Xe-142 (1.25 s) | Xe-111 (740 ms) | Xe-143 (511 ms) | Xe-144 (388 ms) | Xe-145 (188 ms) | Xe-146 (146 ms) | Xe-147 (100 ms) | Xe-110 (93 ms) neutron cross-section | 0.007 b | 25 b neutron mass absorption | 1×10^-5 m^2/kg | 0.0083 m^2/kg
| helium | xenon half-life | (stable) | (stable) stable isotopes | He-4 (99.999863%) | He-3 (1.37×10^-6) | Xe-132 (26.909%) | Xe-129 (26.4%) | Xe-131 (21.232%) | Xe-134 (10.436%) | Xe-136 (8.857%) | Xe-130 (4.071%) | Xe-128 (1.91%) | Xe-124 (9.5×10^-4) | Xe-126 (8.9×10^-4) nuclear spin | He-3: 1/2^+ | He-4: 0^+ | He-5: 3/2^- | He-6: 0^+ | He-7: 3/2^- | He-8: 0^+ | He-9: 1/2^+ | He-10: 0^+ | Xe-110: 0^+ | Xe-111: 5/2^+ | Xe-112: 0^+ | Xe-113: 5/2^+ | Xe-114: 0^+ | Xe-115: 5/2^+ | Xe-116: 0^+ | Xe-117: 5/2^+ | Xe-118: 0^+ | Xe-119: 5/2^+ | Xe-120: 0^+ | Xe-121: 5/2^+ | Xe-122: 0^+ | Xe-123: 1/2^+ | Xe-124: 0^+ | Xe-125: 1/2^+ | Xe-126: 0^+ | Xe-127: 1/2^+ | Xe-128: 0^+ | Xe-129: 1/2^+ | Xe-130: 0^+ | Xe-131: 3/2^+ | Xe-132: 0^+ | Xe-133: 3/2^+ | Xe-134: 0^+ | Xe-135: 3/2^+ | Xe-136: 0^+ | Xe-137: 7/2^- | Xe-138: 0^+ | Xe-139: 3/2^- | Xe-140: 0^+ | Xe-141: 5/2^- | Xe-142: 0^+ | Xe-143: 5/2^- | Xe-144: 0^+ | Xe-145: 3/2^- | Xe-146: 0^+ | Xe-147: 3/2^- unstable isotopes | He-6 (806.7 ms) | He-8 (119 ms) | He-9 (7 zs) | He-7 (3.04 zs) | He-10 (1.52 zs) | He-5 (0.76 zs) | Xe-127 (36.345 days) | Xe-133 (125.8 h) | Xe-122 (20.1 h) | Xe-125 (16.9 h) | Xe-135 (9.14 h) | Xe-123 (124.8 min) | Xe-121 (40.17 min) | Xe-120 (40 min) | Xe-138 (14.08 min) | Xe-119 (5.83 min) | Xe-118 (230 s) | Xe-137 (229.1 s) | Xe-117 (61 s) | Xe-116 (59 s) | Xe-139 (39.68 s) | Xe-115 (18 s) | Xe-140 (13.6 s) | Xe-114 (10 s) | Xe-113 (2.74 s) | Xe-112 (2.7 s) | Xe-141 (1.73 s) | Xe-142 (1.25 s) | Xe-111 (740 ms) | Xe-143 (511 ms) | Xe-144 (388 ms) | Xe-145 (188 ms) | Xe-146 (146 ms) | Xe-147 (100 ms) | Xe-110 (93 ms) neutron cross-section | 0.007 b | 25 b neutron mass absorption | 1×10^-5 m^2/kg | 0.0083 m^2/kg

Identifiers

| helium | xenon CAS number | 7440-59-7 | 7440-63-3 PubChem CID number | 23987 | 23991 Gmelin number | | 1125
| helium | xenon CAS number | 7440-59-7 | 7440-63-3 PubChem CID number | 23987 | 23991 Gmelin number | | 1125

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