6.1 Elements

struct
(struct element (atomic-number symbol atomic-mass))
  atomic-number : Positive-Integer
  symbol : Symbol
  atomic-mass : Molar-Mass
type
Element

A struct and a type for elements.

The Periodic Table of Elements:

H

type
Molar-Mass
type
Molar-Mass-Unit

Since mols are dimensionless in this library, these are equivalent to the Mass and Mass-Unit types.

value
g/mol : Molar-Mass-Unit

A gram per mol.

value
elements/sym : (HashTable Symbol Element)
value
elements/n : (HashTable Positive-Integer Element)

Two hash tables containing the elements 1-118. The first maps the element symbols to the elements, and the second maps the atomic numbers to the elements.

procedure
(->element e) → Element
e : (Un Element Symbol Positive-Integer)

If given an element, returns that element. If given a symbol or atomic-number, returns the element with that symbol or atomic-number.

1	Operations, Types, and Structs
2	Units and Dimensions
3	Physical Constants
4	Temperatures
5	Short Names
6	Chemistry

6.1	Elements
6.2	Compounds
6.3	Molar Mass