1=atomic_mass
2=curie_temperature
3=electrical_conductivity
4=electrical_resistivity
5=electronegativity
6=enthalphy_of_fusion
7=enthalphy_of_vapourisation
8=heat_capacity
9=magnetic_susceptibility
10=poissons_ratio
11=shear_modulus
12=speed_of_sound
13=thermal_conductivity
14=thermal_expansion
15=valence_electron_potential
16=vickers_hardness
17=discovery_year
18=youngs_modulus
19=atomic_volume
20=density
21=bulk_modulus
22=brinell_hardness