Thomson Atomic Model = Protons and Electrons Model Analogy = Chocolate Chip Cookie (1 janv. 1897 – 31 déc. 1897)
Description:
In 1897, the English scientist named J.J. Thomson provided the first hint that an atom is made of even smaller particles. He discovered the presence of a negative particle in the atom - the electron. He proposed a model of the atom that is sometimes called the "plum pudding" model. His theory was that atoms are made from a positively-charged substance with negatively-charged electrons scattered about, like raisins in a pudding or chocolate chips in a cookie.Ajouté au bande de temps:
Date:
1 janv. 1897
31 déc. 1897
~ 12 months