Atom type: one-hot encoding of C, N, O, S, F, Cl, Br, I, P, Other (10 dims) - Degree: node degree / 4 (1 dim) - Formal charge: charge / 2 (1 dim) - Number of hydrogens: count / 4 (1 dim) - Is aromatic: binary (1 dim) - Is in ring: binary (1 dim)