1 janv. 1803 - John Dalton
Description:
Dalton came up with an atomic theory that had five main laws.1-All elements are made up of atoms and these atoms are indestructible and indivisible.
2-Atoms of the same element have the same mass and chemically act the same way.
3-Each element is determined by the mass of atoms.The atoms in different elements are all different. They have different masses and different chemical properties.
4-When two or more atoms join together they make a compound element.
5-Atoms can't be created or destroyed by a chemical change.
Ajouté au bande de temps:
Date:
1 janv. 1803
Maintenaint
~ Il y a 222 ans