Promethium 🧪

Unleash the elements. A Pythonic interface to a rich, offline database of chemical information.

Promethium is your go-to periodic table and chemistry toolkit in Python. All data is included for 100% offline use. No internet connection or API keys are required, making it fast, reliable, and perfect for any environment.

✨ Features

• Offline First: All data is bundled with the library. No network calls, ever.
• Comprehensive Element Data: Access dozens of properties for each element, from atomic mass to electronegativity.
• Chemical Equation Balancer: Programmatically balance complex chemical reactions with a single function call.
• Intuitive API: A clean, object-oriented interface that's a joy to use.
• Lightweight & Fast: Built for performance using an efficient data-handling backend.

🚀 Installation

Install Promethium easily with pip:

pip install promethium

💡 Quick Start

Getting started with Promethium is incredibly simple.

Fetching Element Data Look up any element by its name, symbol, or atomic number. The returned object gives you access to all its properties.

from promethium import element

# Find an element by its name (case-insensitive)
thorium = element.name("Thorium")

if thorium:
    print(f"Name: {thorium.name}")
    print(f"Symbol: {thorium.symbol}")
    print(f"Atomic Mass: {thorium.atomic_mass}")
    print(f"Atomic Radius: {thorium.atomic_radius} pm")
    
# >>> Name: Thorium
# >>> Symbol: Th
# >>> Atomic Mass: 232.0377
# >>> Atomic Radius: 179 pm

Balancing Chemical Equations

Provide lists of reactants and products, and let the balancer do the work, returning a dictionary of stoichiometric coefficients.

from promethium import balance_equation

# Balance the formation of water
reactants = ['H2', 'O2']
products = ['H2O']

balanced = balance_equation(reactants, products)

print(f"Reactants: {balanced['reactants']}")
print(f"Products: {balanced['products']}")

# >>> Reactants: {'H2': 2, 'O2': 1}
# >>> Products: {'H2O': 2}
# This represents the equation: 2H₂ + O₂ ⟶ 2H₂O

Getting all the Data of an Element

from promethium.balancer import balance_equation
from promethium.element_handler import ElementFinder

# --- Test element finder ---
element_finder = ElementFinder()

th = element_finder.name("thorium")
if th:
    print("--- Element Information ---")
    for key, value in th.__dict__.items():
        print(f"{key}: {value}")
    print("-" * 20)



"""
atomic_radius: 180.0
block: f
density: 11.7
description: Grey radioactive metallic element. Belongs to actinoids. Found in monazite sand in Brazil, India and the US. Thorium-232 has a half-life of 1.39x10^10 years. Can be used as a nuclear fuel for breeder reactors. Thorium-232 captures slow Neutrons and breeds uranium-233. Discovered by Jons J. Berzelius in 1829.
dipole_polarizability: 217.0
electron_affinity: nan
electronic_configuration: [Rn] 6d2 7s2
evaporation_heat: 513.7
fusion_heat: 16.11
group_id: nan
lattice_constant: 5.08
lattice_structure: FCC
name: Thorium
period: 7
series_id: 10
specific_heat_capacity: 0.118
symbol: Th
thermal_conductivity: nan
vdw_radius: 245.0
covalent_radius_cordero: 206.0
covalent_radius_pyykko: 175
en_pauling: 1.3
en_allen: nan
jmol_color: #00baff
cpk_color: #ff1493
proton_affinity: nan
gas_basicity: nan
heat_of_formation: 602.0
c6: nan
covalent_radius_bragg: nan
vdw_radius_bondi: nan
vdw_radius_truhlar: nan
vdw_radius_rt: nan
vdw_radius_batsanov: 240.0
vdw_radius_dreiding: nan
vdw_radius_uff: 339.6
vdw_radius_mm3: 274.0
abundance_crust: 9.6
abundance_sea: 1e-06
molcas_gv_color: #00baff
en_ghosh: 0.10277
vdw_radius_alvarez: 293.0
c6_gb: nan
atomic_weight: 232.0377
atomic_weight_uncertainty: 0.0004
is_monoisotopic: nan
is_radioactive: 1
cas: 7440-29-1
atomic_radius_rahm: 288.0
geochemical_class: rare earth & related
goldschmidt_class: litophile
metallic_radius: nan
metallic_radius_c12: nan
covalent_radius_pyykko_double: 143.0
covalent_radius_pyykko_triple: 136.0
discoverers: Jöns Berzelius
discovery_year: 1828.0
discovery_location: Sweden
name_origin: Named for Thor, Norse god of thunder.
sources: Found in various minerals like monazite and thorite.
uses: Used in making strong alloys. Also in ultraviolet photoelectric cells. It is a common ingredient in high-quality lenses. Bombarded with neutrons make uranium-233, a nuclear fuel.
mendeleev_number: 16
dipole_polarizability_unc: 54.0
pettifor_number: 47.0
glawe_number: 34.0
molar_heat_capacity: 27.32
en_miedema: 3.3
miedema_molar_volume: 19.8
miedema_electron_density: 2.1
en_gunnarsson_lundqvist: nan
en_robles_bartolotti: nan
production_concentration: 80.0
relative_supply_risk: 7.6
reserve_distribution: 31.0
political_stability_of_top_producer: 10.8
political_stability_of_top_reserve_holder: 56.6
top_3_producers: 1) India  2) Brazil  3) Malaysia
top_3_reserve_holders: 1) USA  2) Australia  3) India
recycling_rate: nan
substitutability: High
price_per_kg: 287.0
en_mullay: nan
name_lower: thorium
atomic_number: 90

"""

🗺️ Roadmap

1. Isotope data integration
2. Compound property calculator (molecular weight, etc.)
3. Thermodynamic data module
4. 2D/3D molecule visualization hooks

🤝 Contributing

Contributions, issues, and feature requests are welcome! Feel free to check the issues page.

📄 License

This project is licensed under the MIT License.