History of the atom

• What are the models of the atom?

  Plum pudding, Nuclear Model, Electron shell, Dalton
• What did Chadwick discover?

  The neutron
• Name 2 features of the Plum Pudding model of the atom?

  -positive sphere of charge

  -mass spread throughout the atom

  -Has no empty space

  -Electrons are embedded
• Name 2 features of the Nuclear model of the atom?

  -Atom has a positive nucleus

  -The mass of an atom is concentrated in the nucleus

  -Electrons orbit the nucleus

  -Mostly empty space
• Name 2 features of the Bhor (electron shell) model of the atom?

  -Electrons orbit at specific distances from the nucleus in shells

  -Atoms have a positive nucleus

  -The mass of an atom is concentrated in the nucleus

  -Mostly empty space
• Name 2 features of the Dalton model of the atom?

  -Atoms are indivisible

  -Atoms are spherical

  -Atoms contain no charged particles

  -Mass of an atom is evenly spread
• What two things did the gold foil experiment prove?

  -The mass of an atom is concentrated in a nucleus

  -The nucleus has a positive charge