chemical_formula
element_expression
element_expression
element_expression
[Suppress:(= | ·)] operations
[Suppress:(= | ·)] operations
[Suppress:(= | ·)] operations
integer operations
integer operations
optional_separator
optional_separator
integer operations
integer operations
integer operations
integer operations
integer operations
integer
integer
integer operations
integer operations
subscript operations
subscript operations
integer
W:(0-9)
subscript operations
element
element
nested_element
nested_element
subscript
subscript
element
element
nested_element
nested_element
nested_element
'('
[suppress]
element_expression
element_expression
')'
[suppress]
subscript
W:(₀-₉)
element
He|Ho|Hf|Hg|Hs|H|Li|Be|Br|Ba|Bi|Bk|Bh|B|Cl|Ca|Cr|Co|Cu|Cd|Cs|Ce|Cm|Cf|Cn|C|Ne|Na|Ni|Nb|Nd|Np|No|Nh|N|Os|Og|O|Fe|Fr|Fm|Fl|F|Mg|Al|Si|Pd|Pr|Pm|Pt|Pb|Po|Pa|Pu|P|Sc|Se|Sr|Sn|Sb|Sm|Sg|S|Ar|Kr|K|Ti|V|Mn|Zn|Ga|Ge|As|Rb|Yb|Y|Zr|Mo|Tc|Ru|Rh|Ag|In|Te|Ir|I|Xe|La|Eu|Gd|Tb|Dy|Er|Tm|Lu|Ta|W|Re|Au|Tl|At|Rn|Ra|Ac|Th|U|Am|Es|Md|Lr|Rf|Db|Mt|Ds|Rg|Mc|Lv|Ts
optional_separator
= | ·
= | ·
[suppress]
= | ·
[=·]