The atomic number is the same as the proton number, so the answer would be 10.
Emperor Constantine I converted to Christianity. One major step he took to increase tolerance of Christians was the Edict of Milan, which declared religious tolerance for Christians within the Roman Empire.
The French Revolution and the American Revolution were almost direct results of Enlightenment thinking. The idea that society is a social contract between the government and the governed stemmed from the Enlightenment as well