Cl, Br

chlorine (chemical element) | bromine (chemical element)

Periodic table location

Images

| chlorine | bromine atomic symbol | Cl | Br atomic number | 17 | 35 short electronic configuration | [Ne]3s^23p^5 | [Ar]4s^23d^104p^5 Aufbau diagram | 3p 3s | 4p 3d 4s block | p | p group | 17 | 17 period | 3 | 4 atomic mass | 35.45 u | 79.904 u half-life | (stable) | (stable)

| chlorine | bromine phase at STP | gas | liquid melting point | -101.5 °C | -7.3 °C boiling point | -34.04 °C | 59 °C critical temperature | 416.9 K | 588 K critical pressure | 7.991 MPa | 10.34 MPa molar heat of fusion | 3.2 kJ/mol | 5.8 kJ/mol molar heat of vaporization | 10.2 kJ/mol | 14.8 kJ/mol specific heat at STP | 478.2 J/(kg K) | 947.3 J/(kg K) adiabatic index | 7/5 | (properties at standard conditions)

| chlorine | bromine density | 0.003214 g/cm^3 | 3.12 g/cm^3 liquid density | | 3.12 g/cm^3 molar volume | 11030 cm^3/mol | 25.61 cm^3/mol bulk modulus | 1.1 GPa | 1.9 GPa refractive index | 1.000773 | 1.001132 sound speed | 206 m/s | thermal conductivity | 0.0089 W/(m K) | 0.12 W/(m K) (properties at standard conditions)

| chlorine | bromine electrical type | insulator | insulator resistivity | 100 Ω m (ohm meters) | 1×10^10 Ω m (ohm meters) electrical conductivity | 0.01 S/m (siemens per meter) | 1×10^-10 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic volume magnetic susceptibility | -2.31×10^-8 | -1.53×10^-5 mass magnetic susceptibility | -7.2×10^-9 m^3/kg (cubic meters per kilogram) | -4.9×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -5.11×10^-10 m^3/mol (cubic meters per mole) | -7.83×10^-10 m^3/mol (cubic meters per mole) color | (yellow) | (red) refractive index | 1.000773 | 1.001132

| chlorine | bromine valence | 5 | 5 electronegativity | 3.16 | 2.96 electron affinity | 349 kJ/mol (kilojoules per mole) | 324.6 kJ/mol (kilojoules per mole) first ionization energy | 1251.2 kJ/mol (kilojoules per mole) | 1139.9 kJ/mol (kilojoules per mole) ionization energies | 1251.2 kJ/mol | 2298 kJ/mol | 3822 kJ/mol | 5158.6 kJ/mol | 6542 kJ/mol | 9362 kJ/mol | 11018 kJ/mol | 33604 kJ/mol | 38600 kJ/mol | 43961 kJ/mol | 1139.9 kJ/mol | 2103 kJ/mol | 3470 kJ/mol | 4560 kJ/mol | 5760 kJ/mol | 8550 kJ/mol | 9940 kJ/mol | 18600 kJ/mol

Reactivity

| chlorine | bromine term symbol | ^2P_(3/2) | ^2P_(3/2) atomic radius | 100 pm | 115 pm covalent radius | 102 pm | 120 pm van der Waals radius | 175 pm | 185 pm (electronic ground state properties)

| chlorine | bromine universe abundance | 1×10^-4 mass% | 7×10^-7 mass% solar abundance | 8×10^-4 mass% | meteorite abundance | 0.037 mass% | 1.2×10^-4 mass% crust abundance | 0.017 mass% | 3×10^-4 mass% ocean abundance | 2 mass% | 0.0067 mass% human abundance | 0.12 mass% | 2.9×10^-4 mass% universe molar abundance | 4×10^-6 mol% | 1×10^-8 mol% solar molar abundance | 3×10^-5 mol% | meteorite molar abundance | 0.016 mol% | 2.3×10^-5 mol% ocean molar abundance | 0.35 mol% | 5.2×10^-4 mol% crust molar abundance | 0.0099 mol% | 7.8×10^-5 mol% human molar abundance | 0.021 mol% | 2.3×10^-5 mol%

| chlorine | bromine half-life | (stable) | (stable) stable isotopes | Cl-35 (75.77%) | Cl-37 (24.23%) | Br-79 (50.69%) | Br-81 (49.31%) nuclear spin | Cl-28: 1^+ | Cl-29: 3/2^+ | Cl-30: 3^+ | Cl-31: 3/2^+ | Cl-32: 1^+ | Cl-33: 3/2^+ | Cl-34: 0^+ | Cl-35: 3/2^+ | Cl-36: 2^+ | Cl-37: 3/2^+ | Cl-38: 2^- | Cl-39: 3/2^+ | Cl-40: 2^- | Cl-41: 1/2^+ | Cl-43: 1/2^+ | Cl-45: 1/2^+ | Cl-47: 3/2^+ | Cl-49: 3/2^+ | Cl-51: 3/2^+ | Br-67: 1/2^- | Br-68: 3^+ | Br-69: 1/2^- | Br-70: 0^+ | Br-71: 5/2^- | Br-72: 1^+ | Br-73: 1/2^- | Br-74: 0^- | Br-75: 3/2^- | Br-76: 1^- | Br-77: 3/2^- | Br-78: 1^+ | Br-79: 3/2^- | Br-80: 1^+ | Br-81: 3/2^- | Br-82: 5^- | Br-83: 3/2^- | Br-84: 2^- | Br-85: 3/2^- | Br-86: 2^- | Br-87: 3/2^- | Br-88: 2^- | Br-91: 3/2^- | Br-92: 2^- | Br-93: 5/2^- | Br-95: 3/2^- | Br-97: 3/2^- unstable isotopes | Cl-36 (0.3 Myr) | Cl-39 (56.2 min) | Cl-38 (37.23 min) | Cl-40 (81 s) | Cl-41 (38.4 s) | Cl-42 (6.8 s) | Cl-43 (3.13 s) | Cl-33 (2.511 s) | Cl-34 (1.5264 s) | Cl-44 (560 ms) | Cl-45 (413 ms) | Cl-32 (298 ms) | Cl-46 (232 ms) | Cl-31 (150 ms) | Cl-47 (101 ms) | Cl-50 (20 ms) | Cl-51 (200 ns) | Cl-48 (200 ns) | Cl-49 (170 ns) | Cl-30 (30 ns) | Cl-29 (20 ns) | Br-77 (57.0361 h) | Br-82 (35.2833 h) | Br-76 (16.2 h) | Br-83 (140 min) | Br-75 (97 min) | Br-84 (31.8 min) | Br-74 (25.4 min) | Br-80 (17.68 min) | Br-78 (6.47 min) | Br-73 (200 s) | Br-85 (174 s) | Br-72 (78.6 s) | Br-87 (55.65 s) | Br-86 (55.1 s) | Br-71 (21.4 s) | Br-88 (16.29 s) | Br-89 (4.4 s) | Br-90 (1.91 s) | Br-91 (541 ms) | Br-92 (343 ms) | Br-93 (102 ms) | Br-70 (79.1 ms) | Br-94 (70 ms) | Br-68 (1.2 µs) | Br-97 (150 ns) | Br-96 (150 ns) | Br-95 (150 ns) | Br-69 (24 ns) neutron cross-section | 35.3 b | 6.8 b neutron mass absorption | 0.033 m^2/kg | 0.002 m^2/kg

| chlorine | bromine CAS number | 7782-50-5 | 7726-95-6 PubChem CID number | 24526 | 24408