atomicmass¶

atomicmass - Return the atomic mass of an atom or molecule.

This is really just a wrapper for periodictable but returns the mass as an astropy quantity.

atomicdataMB.atomicmass.atomicmass(species)[source]¶

Return the atomic mass of an atom or molecule.

Parameters

species: Chemical formula requested species. See periodictable for formatting options.

Returns

The atomicmass of species as an astropy quantity with units = AMU \((1\, \mathrm{AMU} = 1.660539 \times 10^{-27}\, \mathrm{kg})\). If periodictable returns a ValueError, None is returned.

Examples

>>> from atomicdataMB import atomicmass
>>> print(atomicmass('Na'))
22.98977 u
>>> print(atomicmass('H2O'))
18.01528 u
>>> print(atomicmass('X'))
WARNING: mathMB.atomicmass: X not found
None