Package: pyelementary
pyelementaryYet another elements packageElementary isanotherelements package defined in Python. It is written to be usable with a number of different unit systems and classes. At its most minimal, it has no dependencies outside the main Python library. However, the real point of the package is to automagically work with a number of units classes and be generally flexible.UsageStandardYou can use Elementary immediately by importing the standardElementclass. Please see the documentation for more. Each element is defined uniquely to allow foriscomparisons.In [1]: import pyelementary as elm

In [2]: h = elm.Element(atomic_number=1)

In [3]: h is elm.Element(name="hydrogen")
Out[3]: True

In [4]: h.mass
Out[4]: 1.00782503223Supported attributes include:atomic_numbersymbolnamemass (in atomic mass units)periodgroupcovalent_radius (in angstrom)Each attribute can be used to obtain an Element or list of Elements. Floats are rounded to the nearest 4 decimals when usingElement().In [5]: elm.Element(mass=1.0078)
Out[5]: Element(name='hydrogen', symbol='H', atomic_number=1, mass=1.00782503223, period=1, group=1, covalent_radius=0.31)UsingElement()to retrieve an element can be quite slow, as a number of different cases are checked. If your search is more defined, you can access registries for each attribute directly atElement.registry. Keys for all floats are rounded to 4 decimal places.In [6]: elm.Element.registry.mass[1.0078]
Out[6]: Element(name='hydrogen', symbol='H', atomic_number=1, mass=1.00782503223, period=1, group=1, covalent_radius=0.31)For attributes where multiple elements have the same value, a sorted tuple of elements is returned.In [8]: elm.Element(period=5)
Out[8]:
(Element(name='rubidium', symbol='Rb', atomic_number=37, mass=84.9117897379, period=5, group=1, covalent_radius=2.2),
 Element(name='strontium', symbol='Sr', atomic_number=38, mass=87.9056125, period=5, group=2, covalent_radius=1.95),
 Element(name='yttrium', symbol='Y', atomic_number=39, mass=88.9058403, period=5, group=3, covalent_radius=1.9),
 Element(name='zirconium', symbol='Zr', atomic_number=40, mass=89.9046977, period=5, group=4, covalent_radius=1.75),
 Element(name='niobium', symbol='Nb', atomic_number=41, mass=92.906373, period=5, group=5, covalent_radius=1.64),
 Element(name='molybdenum', symbol='Mo', atomic_number=42, mass=97.90540482, period=5, group=6, covalent_radius=1.54),
 Element(name='technetium', symbol='Tc', atomic_number=43, mass=97.9072124, period=5, group=7, covalent_radius=1.47),
 Element(name='ruthenium', symbol='Ru', atomic_number=44, mass=101.9043441, period=5, group=8, covalent_radius=1.46),
 Element(name='rhodium', symbol='Rh', atomic_number=45, mass=102.905498, period=5, group=9, covalent_radius=1.42),
 Element(name='palladium', symbol='Pd', atomic_number=46, mass=105.9034804, period=5, group=10, covalent_radius=1.39),
 Element(name='silver', symbol='Ag', atomic_number=47, mass=106.9050916, period=5, group=11, covalent_radius=1.45),
 Element(name='cadmium', symbol='Cd', atomic_number=48, mass=113.90336509, period=5, group=12, covalent_radius=1.44),
 Element(name='indium', symbol='In', atomic_number=49, mass=114.903878776, period=5, group=13, covalent_radius=1.42),
 Element(name='tin', symbol='Sn', atomic_number=50, mass=119.90220163, period=5, group=14, covalent_radius=1.39),
 Element(name='antimony', symbol='Sb', atomic_number=51, mass=120.903812, period=5, group=15, covalent_radius=1.39),
 Element(name='tellurium', symbol='Te', atomic_number=52, mass=129.906222748, period=5, group=16, covalent_radius=1.38),
 Element(name='iodine', symbol='I', atomic_number=53, mass=126.9044719, period=5, group=17, covalent_radius=1.39),
 Element(name='xenon', symbol='Xe', atomic_number=54, mass=131.9041550856, period=5, group=18, covalent_radius=1.4))These can be narrowed down with multiple keyword arguments.In [9]: elm.Element(period=5, group=17)
Out[9]: (Element(name='iodine', symbol='I', atomic_number=53, mass=126.9044719, period=5, group=17, covalent_radius=1.39),)UnitsThe default units in the standard elements library are:mass: atomic mass unitslength: angstromSourcesThe data in the standard package are sourced, with much gratitude, fromqcelementalversion 0.23.0.
Please see the documentation forqcelementalfor full details.
The covalent radii are obtained from Alvarez 2008.CopyrightCopyright (c) 2022, Lily WangAcknowledgementsProject based on theComputational Molecular Science Python Cookiecutterversion 1.6.