stereochemistry and regioselectivity. His rules are important in the chemical industry as alkenes or double bonds are present between many molecules that we use today for various products. Molecules that go against his rule or Anti-Markovnikov products are more common in the chemical industry which helps us to better understand how molecules add to carbon to carbon double bonds. He also proved his theories true with silver oxide tests whih in his case showed that bromine and iodine were bonded to the same carbon atom hence them adding to the less hydrogen substituated carbon atom. Hydrogen chloride and hydrogen bromide when added to an alkene were shown clearly as key representation of Markovnikovs rule so that it can be proven and tested today along with the following silver oxide test. But even with the evidence he had Markovnikov was not 100% about his work or even his own rule because at the time they lacked the technology to prove for sure that these forces occurred. With all these contributions we today are able to better understand bond angles on hybridized carbons. In order for certain bonds to form an atom may have to be at at certain angle where to atoms can meet and share electrons. Even with extensive research and rules such as Markovnikovs there are still many undiscovered mysteries in the field of organic synthesis. John Dalton In 1803, English meteorologist and chemist John Dalton proposed Dalton's law, which describes the relationship between the components in a mixture of gases and the relative pressure each contributes to that of the overall mixture. Discovered in 1801, this concept is also known as Dalton's law of partial pressures. Dalton also proposed a modern atomic theory in 1803 which stated that all matter was composed of small indivisible particles termed atoms, atoms of a given element possess unique characteristics and weight, and three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules). In 1808, Dalton first published New System of Chemical Philosophy (1808–1827), in which he outlined the first modern scientific description of the atomic theory. This work identified chemical elements as a specific type of atom, therefore rejecting Newton's theory of chemical affinities. Instead, Dalton inferred proportions of elements in compounds by taking ratios of the weights of reactants, setting the atomic weight of hydrogen to be identically one. Following Jeremias Benjamin Richter (known for introducing