History of the Atom

HideShow resource information
View mindmap
  • History of the Atom
    • Dalton's Theory (1800's); Elements are made of extremely small particles called atoms. Atoms in the same element are identical in size,mass and other properties an vice versa. Atoms cannot be subdivided, created or destroyed. In Chemical reactions, atoms are combined, separated or rearranged. Also, he though atoms were solid spheres.
    • JJ Thomson's plum pudding theory (1897); Thomson  thought that electrons were scattered out through a cloud of positive charge.
    • Rutherford's theory of the nuclear atom (1911) ; Rutherford's experiment 'gold and foil' showed that atoms consisted of a positively charged  nucleus   surrounded by negatively charged electrons.  It also showed that the nucleus contained the mass of the atom.
    • Bohr further developed Rutherford's nuclear atom model. He used experimental evidence to support the idea that electrons occupy particular orbits or shells. His theory explained atomic structure.
  • Dalton's Theory (1800's); Elements are made of extremely small particles called atoms. Atoms in the same element are identical in size,mass and other properties an vice versa. Atoms cannot be subdivided, created or destroyed. In Chemical reactions, atoms are combined, separated or rearranged. Also, he though atoms were solid spheres.

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms and compounds resources »