Element lookup
Look up a periodic-table element by exactly one of `symbol` (e.g. "Fe"), `name` (e.g. "iron") or atomic `number` (1..118). Returns its number, symbol, name, standard atomic weight and whether that weight is a true standard atomic weight.
- Category
- Other services
- Starting price
- $0.004
- Paid calls · 30 days
- 35
- Unique payers · 30 days
- 5
Paid endpoints
2 endpoints, sorted by usage. Prices are per request.
- POST/v1/element
Look up a periodic-table element by exactly one of `symbol` (e.g. "Fe"), `name` (e.g. "iron") or atomic `number` (1..118). Returns its number, symbol, name, standard atomic weight and whether that weight is a true standard atomic weight.
$0.004Base33calls / 30d - POST/v1/molar-mass
Compute the molar mass (g/mol) of a chemical formula. Supports nested parentheses and brackets, element multipliers, and hydrate dot notation with coefficients (e.g. "Ca(OH)2", "CuSO4·5H2O", "K4[Fe(CN)6]"). Returns the total mass and the per-element composition with mass fraction percentages.
$0.004Base2calls / 30d