
Antimony (Sb) is a chemical element of the periodic table, located in the group 15 and the period 5, and is having the atomic number 51. It is a hard, brittle, lustrous, silvery-grey metalloid, whose name comes from the Greek word “anti-monos”, which means not alone. It is a member of the pnictogen group.
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– p block |
FAQs on Antimony Element
Antimony |
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‣ What does antimony look like? Appearance: silvery lustrous grey |
‣ When was antimony discovered and by whom? Discovery: Arabic alchemists (before AD 815) |
‣ Where is antimony found on the periodic table?![]() Location: Antimony is found in the fifth row of the periodic table below the arsenic element. |
‣ What is the atomic number of antimony? Atomic number (Z): 51 |
‣ What is antimony’s symbol? Symbol: Sb |
‣ What is the atomic weight for antimony? Standard atomic weight: 121.760 |
‣ What block does antimony belong to? Block: p-block |
‣ What group is antimony in on the periodic table? Group: 15 (pnictogens) |
‣ What period is antimony in on the periodic table? Period: 5 |
‣ Antimony atomic radius: empirical: 140 pm |
‣ Antimony covalent radius: 139±5 pm |
‣ Antimony Van der Waals radius: 206 pm |
‣ What is the melting point of antimony? Melting point: 903.78 K (630.63 °C, 1167.13 °F) |
‣ What is antimony boiling point? Boiling point: 1908 K (1635 °C, 2975 °F) |
‣ How many electron shells does antimony have? Electrons per shell: 2, 8, 18, 18, 5 |
‣ What’s the electron configuration of antimony? Electron configuration: [Kr] 4d10 5s2 3p3 |
‣ What is the ionization energy of antimony? Ionization energies: 1st: 834 kJ/mol 2nd: 1594.9 kJ/mol 3rd: 2440 kJ/mol |
‣ What is the phase of antimony? Phase (at r.t): solid |
‣ What is the density of antimony? Density (near r.t): 6.697 g/cm3 when liquid (at m.p): 6.53 g/cm3 |
‣ Antimony magnetic ordering: diamagnetic |
‣ Antimony natural occurrence: primordial |
‣ Antimony oxidation state: -3, +3, +5 |
‣ Antimony electronegativity: Pauling scale: 2.05 |
‣ Antimony heat of fusion: 19.79 kJ/mol |
‣ Antimony heat of vaporization: 193.43 kJ/mol |
‣ Antimony molar heat capacity: 25.23 J/(mol K) |
‣ Antimony molar magnetic susceptibility: -99.0 × 10-6 cm3/mol |
‣ Speed of sound in antimony: 3420 m/s (at 20 °C) |
‣ Antimony crystal structure: rhombohedral |
‣ Thermal expansion of antimony: 11 µm/(m.K) (at 25 °C) |
‣ Thermal conductivity of antimony: 24.4 W/(m.K) |
‣ Antimony electrical resistivity: 417 nΩ.m (at 20 °C) |
‣ What is the hardness of antimony? Mohs hardness: 3.0 Brinell hardness: 294-384 MPa |
‣ Young’s modulus of antimony: 55 GPa |
‣ Shear modulus of antimony: 20 GPa |
‣ Bulk modulus of antimony: 42 GPa |
‣ Antimony CAS number: 7440-36-0 |
‣ Antimony vapor pressure
Vapor pressure | ||||||
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P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
at T (K) | 807 | 876 | 1011 | 1219 | 1491 | 1858 |
‣ How many isotopes does antimony have?
Main isotopes of antimony | ||||
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Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
121Sb | 57.21 % | stable | ||
123Sb | 42.79 % | stable | ||
125Sb | syn | 2.7582 y | β– | 125Te |
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