PyValem Demo

Enter a chemical formula or reaction:

Examples

  • Mass: u
  • Charge:

Ar
(79Br)
Na+
Ca+2
W+11
(35Cl)-
(17O)-2

Ar 1S_0
Ar+ 2P_1/2
He 1s2
Li 1s2.2s1
C 1s2.2s2.2p2
Si+ [Ne].3s2.3p1
Si+ [Ne].3s2.3p1; 2P_3/2

H2O
C2H5OH
H2(18O)
(16O)(1H)-

CO 1SIGMA+
CO 1SIGMA+;v=0;J=2
OH X(2Π_3/2)
NH3 2v2+v3;J=5;Ka=2;Kc=3

H2 + e- -> H2+ + e- + e-
HeH+ + e- -> He + H+ + e-
O2 X(3SIGMA-g) + hv -> O2 a(1DELTAg)

(52Cr)(1H) X(6SIGMA+); J=5/2; N=0; F=3 + hv -> (52Cr)(1H) X(6SIGMA+); J=7/2; N=1; F=4

e- + Si2H6 → e- + H + SiH3 + SiH2
e- + N2 v=0 -> e- + N2 v=1
Ar + e- -> Ar * + e-

e- + B -> e- + B 3D
e- + BF+ -> F + B 

H2O + H+ -> H3O        [NB error: charge not conserved]
H2O + H+ -> H3O+ + OH   [NB error: stoichiometry not conserved]
CH3CO2H + H2O <-> CH3CO2- + H3O+