Stanislao Cannizzaro Quest for Knowledge

Cannizzaro supported studies of salicin and glucoside and studied chemistry for the next two years. In the summer of 1847, he attempted to return to Palermo to complete the study The revolution of the Bourbon dynasty collapsed and Cannizzaro became an artillery officer. When the rebellion failed and sentenced to death, Cannizzaro fled to Marseille and immediately fled to Paris. So he studied cyanamide and successfully synthesized cyanamide. After expulsion for several years, Cannizzaro returned to Italy and accepted the position of physics, chemistry and mechanics at Alexandria's Technical College in 1851.

Mendelayev was born in Siberia. He studied chemistry at St. Petersburg University and was sent to study at the University of Heidelberg in 1859. So, he met the Italian chemist Stanislao Cannizzaro. And its influence on atomic weight influenced his thinking. Mendeleev is a famous teacher who became a masterpiece after writing his book "Principles of Chemistry". During the writing of this book, Mendeleev tried to classify elements based on their chemical properties. In 1869 he published the periodic table of his first edition, which he proved the cycle law. In 1871, he published an improved version of the periodic table, leaving blanks of unknown elements there. His diagrams and theories became increasingly recognized when three predictors, gallium, germanium, and germanium were discovered afterwards.

Avogadro's hypothesis began to attract a wide range of enthusiasm among chemists only in 1858 after his brotherhood enthusiast and scientist Stanislao Canizaro proved its value. The chemical interest of Cannizzaro was originally focused on the reaction between natural products and aromatic compounds, but in 1853 I discovered that treatment of benzaldehyde with concentrated alkali produces both benzoic acid and benzyl alcohol. Zara reaction In his 1858 brochure, Cannizzaro says that the idea of ​​complete return to Avodadro can be used to build a consistent robust theoretical structure that fits almost all available empirical evidence I showed it. For example, the evidence suggested that evidence suggests that not all elemental gases are composed of two atoms of each molecule - some are single atoms, some are two atoms, and even more It's complicated.

In 1811, Amedeo Avogadro confirmed that the same amount of pure gas contained the same amount of particles. His theory was universally accepted until another Italian chemist Stanislau Canizaro in 1858 could explain a non-ideal exception. For his study on gas used a century ago, the Avogadro constant named after him shows the number of atoms found in 12 grams of elemental carbon-12 (6.02 x 1023 mol-1) is showing. This specific amount of gas particles at standard temperature and pressure (ideal gas law) accounts for 22.40 liters, which is called the molar volume.