What decade did Napoleon Bonaparte become Emperor of France?

Oh, dear Heaven, no. Napoleon becoming Emperor put a temporary stop to the Revolution. First, there was the old Régime. The people weren't happy with that and blamed all their problems on the royal family, whom they killed, this period is called the French Revolution and started in 1789. This was followed by a constitution called the Directorate, which was replaced by another called the Consulate. Napoleon became Consul, then First Consul, and eventually commited a coup (in 1799) crowning himself emperor and thus turning France into an Empire. When Napoleon was defeated, the Old Régime was restored, then Napoleon came back and restored the Empire. Then out he went again, and the Old Régime lasted until 1830, when it was replaced by a constitutional monarchy under a different dynasty. In 1848 another revolution founded the Second Republic. The President of this restored the Empire under himself as Napoleon III, and lasted until 1870, when the Third Republic chased him out. That lasted until 1940 and the Vichy régime, and when that was defeated in 1945 a new constitution installed the Fourth Republic. That was dissolved in 1968 and the Fifth Republic came in, and so far has lasted. Since 1789 France has had 23 constitutions. So we know the Revolution started in 1789, and ended in 1799. Napoleon ended the revolution. If, indeed, it has ended. The point is, 'The French Revolution' is a misleading term. There have been many. What Napoleon ended was simply the first attempt at a Republic.