Physical chemistry

• Who discovered the plum pudding model?

  J.J. Thomson
• Who said atoms are solid spheres?

  Dalton
• What did Rutherford discover?

  Nucleus
• What experiment did Rutherford do ?

  Gold foil experiment
• What did Rutherford experiment show ?

  An atom is mostly empty space with a positive nucleus
• What did the plum pudding model show ?

  Electrons
• When did dalton say atoms are solid spheres?

  1803-1805
• What did Bohr discover?

  Electrons are in fixed shells
• Who discovered the protons?

  Ernest Rutherford
• Who discovered neutrons?

  James Chadwick
• What is the formula to calculate the number of moles?


  Number of moles = given mass / molar mass