Using the bootstrap seems to cause regressions.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Avoid set the atomic number twice. Previously invoking 'new Element("H", null)' would still set the atomic number to '1'. Chaining the constructors so that all fields are assigned in the same places avoids this problem.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>