14th Group
Carbon (C), Silicon (Si), Germanium (Ge)
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Default: CH4, SiH4, GeH4 respectively.
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Molecules:
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Neutral atoms Implicit Hydrogens are added to have 4 bonds. 5 or more bonds are forbidden.
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Charged atoms: Every added charge on these atoms (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is ±4.
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Radical: Every added radical on these atoms decreases by one the number accepted of bonds.
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Aromatic compounds: Carbon may form aromatic bonds as well.
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Tin (Sn)
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Default: Sn
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Molecules:
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Neutral atoms: Implicit Hydrogens are added to have 4 bonds (if Tin has at least 1 bond). 5 or 6 bonds are also accepted.
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Charged atoms:
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Positive charge: Every added charge (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is +4.
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Negative charge: Not allowed.
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Radical: Every added radical on these atoms decreases by one the number accepted of bonds.
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Ions:
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Sn2+ and Sn4+ are accepted.
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Other:
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Sn with 2 electrons in bonds and with at least to coordinate bonds are accepted.
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Lead (Pb)
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Default: Pb
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Molecules:
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Neutral atom:
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1 or 2 bonds: 1 or 0 implicit hydrogen is added, respectively.
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3 or 4 bonds: 1 or 0 implicit hydrogen is added, respectively.
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5 or 6 bonds are accepted.
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More than 6 bonds are forbidden.
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Charged atom:
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Positive charge: Every added charge (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is +4.
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Negative charge: Not allowed.
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Radical: Every added radical on these atoms decreases by one the number accepted of bonds.
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Ions:
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Pb2+ and Pb4+ are accepted.
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