# NOT RUN {
data(elements)
elements
# Get the mass of some elements
symb <- c("C","O","H")
elements[match(symb,elements[,"symb"]),"mass"]
# Get the van der Waals radii of some elements
symb <- c("C","O","H")
elements[match(symb,elements[,"symb"]),"rvdw"]
# }
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