Oxygen was first discovered in 1772 by Swedish chemist Carl Wilhelm Scheele. Two years later, English chemist Joseph Priestly also discovered oxygen and published his findings the same year, three years before Scheele published his findings. In 1775, oxygen was discovered again by French chemist Antoine Lavoisier, who was the first to classify oxygen as an element and also named oxygen. Oxygen comes from the Greek words “oxys” and “genes”, which together mean “acid forming.” Lavosier named the element oxygen because he mistakenly believed that oxygen was necessary to form all acids. One place that oxygen is found in nature is water. Water is made up of two parts hydrogen and 1 parts oxygen. Oxygen is also found wherever there are green plants and/or trees. Plants and trees absorb carbon dioxide and produce oxygen as a by-product. Oxygen contains 8 protons, 8 electrons, and 8 neutrons. In its natural state, oxygen is a colorless, odorless, and tasteless gas. It is neither dangerous nor explosive. It is a member of group number 16 on the periodic table, Chalcogen.Oxygen was first discovered in 1772 by Swedish chemist Carl Wilhelm Scheele. Two years later, English chemist Joseph Priestly also discovered oxygen and published his findings the same year, three years before Scheele published his findings. In 1775, oxygen was discovered again by French chemist Antoine Lavoisier, who was the first to classify oxygen as an element and also named oxygen. Oxygen comes from the Greek words “oxys” and “genes”, which together mean “acid forming.” Lavosier named the element oxygen because he mistakenly believed that oxygen was necessary to form all acids. One place that oxygen is found in nature is water. Water is made up of two parts hydrogen and 1 parts oxygen. Oxygen is also found wherever there are green plants and/or trees. Plants and trees absorb carbon dioxide and produce oxygen as a by-product. Oxygen contains 8 protons, 8 electrons, and 8 neutrons....