arsenic vs cobalt vs nickel

arsenic (chemical element) | cobalt (chemical element) | nickel (chemical element)

Periodic table location

Images

| arsenic | cobalt | nickel atomic symbol | As | Co | Ni atomic number | 33 | 27 | 28 short electronic configuration | [Ar]4s^23d^104p^3 | [Ar]4s^23d^7 | [Ar]4s^23d^8 Aufbau diagram | 4p 3d 4s | 3d 4s | 3d 4s block | p | d | d group | 15 | 9 | 10 period | 4 | 4 | 4 atomic mass | 74.921595 u | 58.933194 u | 58.6934 u half-life | (stable) | (stable) | (stable)

| arsenic | cobalt | nickel phase at STP | solid | solid | solid melting point | 817 °C | 1495 °C | 1455 °C boiling point | 614 °C | 2927 °C | 2913 °C molar heat of fusion | 27.7 kJ/mol | 16.2 kJ/mol | 17.2 kJ/mol molar heat of vaporization | 32.4 kJ/mol | 375 kJ/mol | 378 kJ/mol specific heat at STP | 328 J/(kg K) | 421 J/(kg K) | 445 J/(kg K) (properties at standard conditions)

| arsenic | cobalt | nickel density | 5.727 g/cm^3 | 8.9 g/cm^3 | 8.908 g/cm^3 liquid density | 5.22 g/cm^3 | 7.75 g/cm^3 | 7.81 g/cm^3 molar volume | 13.08 cm^3/mol | 6.6 cm^3/mol | 6.589 cm^3/mol Mohs hardness | 3.5 (between calcite and fluorite) | 5 (≈ apatite) | 4 (≈ fluorite) Vickers hardness | 1510 MPa | 1043 MPa | 638 MPa Brinell hardness | 1440 MPa | 700 MPa | 700 MPa bulk modulus | 22 GPa | 180 GPa | 180 GPa shear modulus | | 75 GPa | 76 GPa Young's modulus | 8 GPa | 209 GPa | 200 GPa Poisson ratio | | 0.31 | 0.31 tensile yield strength | | 225 MPa | 59 MPa ultimate tensile strength | | | 317 MPa refractive index | 1.001552 | (unknown) | sound speed | | 4720 m/s | 4970 m/s thermal expansion | | 1.3×10^-5 K^(-1) | 1.34×10^-5 K^(-1) thermal conductivity | 50 W/(m K) | 100 W/(m K) | 91 W/(m K) (properties at standard conditions)

| arsenic | cobalt | nickel electrical type | conductor | conductor | conductor resistivity | 3×10^-7 Ω m (ohm meters) | 6×10^-8 Ω m (ohm meters) | 7×10^-8 Ω m (ohm meters) electrical conductivity | 3.3×10^6 S/m (siemens per meter) | 1.7×10^7 S/m (siemens per meter) | 1.4×10^7 S/m (siemens per meter) magnetic type | diamagnetic | ferromagnetic | ferromagnetic volume magnetic susceptibility | -2.23×10^-5 | | mass magnetic susceptibility | -3.9×10^-9 m^3/kg (cubic meters per kilogram) | | molar magnetic susceptibility | -2.92×10^-10 m^3/mol (cubic meters per mole) | | Curie point | | 1394 K (kelvins) | 631 K (kelvins) work function | 3.75 eV (Polycrystalline) | 5 eV (Polycrystalline) | (5.04 to 5.35) eV threshold frequency | 9.067×10^14 Hz (hertz) | 1.209×10^15 Hz (hertz) | (1.219×10^15 to 1.294×10^15) Hz (hertz) color | (silver) | (gray) | (gray) refractive index | 1.001552 | (unknown) |

| arsenic | cobalt | nickel valence | 5 | 4 | 2 electronegativity | 2.18 | 1.88 | 1.91 electron affinity | 78 kJ/mol (kilojoules per mole) | 63.7 kJ/mol (kilojoules per mole) | 112 kJ/mol (kilojoules per mole) first ionization energy | 947 kJ/mol (kilojoules per mole) | 760.4 kJ/mol (kilojoules per mole) | 737.1 kJ/mol (kilojoules per mole) ionization energies | 947 kJ/mol | 1798 kJ/mol | 2735 kJ/mol | 4837 kJ/mol | 6043 kJ/mol | 12310 kJ/mol | 760.4 kJ/mol | 1648 kJ/mol | 3232 kJ/mol | 4950 kJ/mol | 7670 kJ/mol | 9840 kJ/mol | 12440 kJ/mol | 15230 kJ/mol | 17959 kJ/mol | 26570 kJ/mol | 29400 kJ/mol | 32400 kJ/mol | 36600 kJ/mol | 39700 kJ/mol | 42800 kJ/mol | 49396 kJ/mol | 52737 kJ/mol | 134810 kJ/mol | 145170 kJ/mol | 154700 kJ/mol | 167400 kJ/mol | 737.1 kJ/mol | 1753 kJ/mol | 3395 kJ/mol | 5300 kJ/mol | 7339 kJ/mol | 10400 kJ/mol | 12800 kJ/mol | 15600 kJ/mol | 18600 kJ/mol | 21670 kJ/mol | 30970 kJ/mol | 34000 kJ/mol | 37100 kJ/mol | 41500 kJ/mol | 44800 kJ/mol | 48100 kJ/mol | 55101 kJ/mol | 58570 kJ/mol | 148700 kJ/mol | 159000 kJ/mol | 169400 kJ/mol

Reactivity

| arsenic | cobalt | nickel term symbol | ^4S_(3/2) | ^4F_(9/2) | ^3F_4 atomic radius | 115 pm | 135 pm | 135 pm covalent radius | 119 pm | 126 pm | 124 pm van der Waals radius | 185 pm | (unknown) | 163 pm (electronic ground state properties)

| arsenic | cobalt | nickel universe abundance | 8×10^-7 mass% | 3×10^-4 mass% | 0.006 mass% solar abundance | | 4×10^-4 mass% | 0.008 mass% meteorite abundance | 1.8×10^-4 mass% | 0.059 mass% | 1.3 mass% crust abundance | 2.1×10^-4 mass% | 0.003 mass% | 0.0089 mass% ocean abundance | 2.3×10^-7 mass% | 8×10^-9 mass% | 2×10^-7 mass% human abundance | 5×10^-6 mass% | 2×10^-6 mass% | 1×10^-5 mass% universe molar abundance | 1×10^-8 mol% | 6×10^-6 mol% | 1×10^-4 mol% solar molar abundance | | 7×10^-6 mol% | 2×10^-4 mol% meteorite molar abundance | 4.6×10^-5 mol% | 0.02 mol% | 0.44 mol% ocean molar abundance | 1.9×10^-8 mol% | 8×10^-10 mol% | 2.1×10^-8 mol% crust molar abundance | 5.8×10^-5 mol% | 9.9×10^-4 mol% | 0.0032 mol% human molar abundance | 4×10^-7 mol% | 2×10^-7 mol% | 1.1×10^-6 mol%