Table of Contents
What experiments did Antoine Lavoisier do to the atomic theory?
A later breakthrough in the discovery of the atomic model came through the work of French chemist Antoine Lavoisier who through a series of experiments found that the total mass of products and reactants in a chemical reactions is always the same. This led to the theory of the law of conservation of mass.
What instrument did Lavoisier use in his experiment?
Lavoisier was a superb quantitative chemist, a master of the volumetric flask, the beam balance, the barometer, and the thermometer. Most of his quantitative experiments were performed in closed systems and involved either the consumption or production of gases, which were measured in volumes.
What experiments did Joseph Proust do?
French chemist Joseph Proust proposed the law of definite composition or proportions based on his experiments conducted between 1798 and 1804 on the elemental composition of water and copper carbonate. In 1806, Proust summarized his observations in what is now called Proust’s Law.
What did Joseph Proust contribute to the atomic theory?
He suggested that all matter was composed of tiny indivisible particles, which he called atoms. Joseph Proust found that compounds always contain the same proportion of elements by mass, regardless of amount. This was later called the law of definite proportions.
How did Antoine Lavoisier discover combustion?
In 1772 Lavoisier discovered that when phosphorus or sulfur are burned in air the products are acidic. In 1779 Lavoisier coined the name oxygen for the element released by mercury oxide. He found oxygen made up 20 percent of air and was vital for combustion and respiration.
What did Joseph Priestley discover?
Oxygen
Joseph Priestley/Discovered
Joseph Priestley (1733-1804) — Unitarian minister, teacher, author, and natural philosopher — was the Earl of Shelburne’s librarian and tutor to his sons. In this room, then a working laboratory, Priestley pursued his investigations of gases. On 1 August 1774 he discovered oxygen.
What is Joseph Priestley most known for?
Priestley (1733-1804) was hugely productive in research and widely notorious in philosophy. He invented carbonated water and the rubber eraser, identified a dozen key chemical compounds, and wrote an important early paper about electricity.
What experiments did Henri Becquerel do?
When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.
Who conducted experiments with uranium containing minerals and pure uranium?
[8]Becquerel had found radioactivity in some uranium-containing crystals. A natural question was whether other substances were also active. As she wrote in her dissertation [Curie 1903], “… I made experiments to discover whether substances other than compounds of uranium and thorium were radio-active.