3-coordinate: trigonal planar (p-block element, 2 lone pairs)

[Np(Cl)₄]

Formula Unicode styled: 
[Np(Cl)₄]
Compound name(s): 
terachloro-neptunium
neptunium tetrachloride
Central atom: 
Attached groups: 
Charge on central atom: 
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cl«V3C2O-I»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Pa(Cl)₂(O)]

Formula Unicode styled: 
[Pa(Cl)₂(O)]
Compound name(s): 
dichloro-oxo-protactinium
Protactinium oxide dichloride
Central atom: 
Attached groups: 
Charge on central atom: 
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cl«V3C2O-I»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class):