discovery of nitrogen

Discovery - Daniel Rutherford, a Scottish Physician, discovered nitrogen in 1772. But it was Lavoisier, who proved that nitrogen is an element and that it was not a supporter of combustion and respiration. He called it 'azote' meaning 'no life'. The name 'Nitrogen..

Daniel Rutherford, a Scottish Physician, discovered nitrogen in 1772. But it was Lavoisier, who proved that nitrogen is an element and that it was not a supporter of combustion and respiration. He called it 'azote' meaning 'no life'. The name 'Nitrogen' was given..

Joseph Priestley first prepared ammonia in 1775 by heating Sal ammoniac (ammonium chloride) with slaked lime. Due to its basic nature, he called it alkaline air. In 1785, Comte Claude-Louis Berthollet determined the chemical composition of ammonia (Fig.6.1..

The history of the discovery of cells dates back to the 17 t h century and is closely associated with the history of the invention of microscopes. An Italian microscopist Marcello Malpighi studied the structure of some plants and proposed the idea that plants are composed of tiny structur..

Discovery of Ammonia - Joseph Priestley first prepared ammonia in 1775 by heating Sal ammoniac (ammonium chloride) with slaked lime. Due to its basic nature, he called it alkaline air. In 1785, Comte Claude-Louis Berthollet determined the chemical composition of ammoni..

Discovery of Nitric Acid - Johann Glauber (1604-1668) prepared nitric acid by heating nitre with concentrated sulphuric acid and then condensing the vapour. While Henry Cavendish determined the composition of nitric acid, Lavoisier proved that oxygen is present in nitric acid. Some Basic ..

Ernest Rutherford, an energetic New Zealander working in England, was studying the properties of particles spontaneously emitted by radioactive substances. Of particular interest was a positively charged, relatively heavy emission named alpha particle. Quantities of such particles are emitted by c..

Atoms and Nuclei..

In 1896, the phenomenon of radioactivity was accidentally discovered by French scientist Henri Becquerel. He was performing experiments with uranium compounds. He accidentally placed a crystal of potassium uranyl sulphate over photographic plate wrapped with usual black paper. On developing the p..

The table shows the number of viewers of different TV channels in the U.S. Choose the appropriate box-and-whisker plot for the data and find the mean number of TV viewers. Number of viewers of different TV channels in U.S. Channel Number of viewers (in millions) Discovery 20 Star Sports 1..