Throughout history, the curiosity to know facts that show the functioning of general laws has resulted in the improvement of today's society. Such curiosity for chemical reactions enveloped the minds of John Dalton for atomic theory, Rosalind Franklin for genetics and, above all, Antoine Lavoisier, the father of modern chemistry. All those who worked for a long time to acquire the understanding that fascinated them most, chemistry. Another chemist who pursued the same knowledge was Stanislao Cannizzaro. Studying organic chemistry, Cannizzaro explained how some elements were missing the hydrogen atom in what is known as the Cannizzaro reaction. As the youngest of ten children, Cannizzaro was born in Palermo, Sicily, where his father was a magistrate and minister of police and his mother was a descendant of the Sicilian aristocracy, Anna di Benedetto. Receiving his classical high school diploma in Palermo schools, he enrolled at the University of Palermo to study Medicine. As a medical student Cannizzaro became interested in chemistry and accepted a job at the University of Pisa as a laboratory assistant for Raffaela Piria, a leading Italian chemist. Witnessing the investigations into salicin and glycosides, Cannizzaro studied chemistry for the next two years. During the summer break of 1847, in an attempt to return to Palermo to finish his studies, a revolutionary wave broke out against the Bourbons and Cannizzaro became an artillery officer. When the rebellion failed and he was sentenced to death, Cannizzaro fled to Marseille and soon to Paris, where he researched cyanamide and successfully synthesized it. After a few years of exile, Cannizzaro returned to Italy and in 1851 accepted a position as professor of physics, which ...... middle of paper ...... and Cannizzaro's ideas. The acceptance of Avogadro's hypothesis led Meyer and Dimitri Mendeleev to devise the periodic law at the end of 1860. After the congress Cannizzaro returned to Palermo, where he became an advisor in Garibaldi's new government. A year later he returned to the University of Palermo as professor of inorganic and organic chemistry. By creating a research center of "excellence", Palermo became the leading center for chemical studies. A decade later he moved to Rome and held the position of senator and vice-president of the Italian Senate. In 1856 Cannizzaro married Henrietta Withers and had a son. During his final years Cannizzaro received honors and awards including the Copley Medal of the Royal Society in 1891. When he died in 1910, he influenced, provided and left an essential service in the creation of the modern science of chemistry..