Lecture
This lecture covers the chemistry of oxygen and phosphorus, including their properties, compounds, and industrial applications. It discusses the different allotropes of oxygen, the role of phosphorus in nature, and the preparation of various phosphorus compounds. The presentation also delves into the historical significance of arsenic, antimony, and bismuth, highlighting their properties and uses. Furthermore, it explores the toxicology of arsenic and the discovery of oxygen by Joseph Priestley and Antoine Lavoisier. The lecture concludes with a discussion on the paramagnetic properties of oxygen and the chemistry of the ozone layer.