Atomic Theory Crossword Puzzle

QUESTIONS LIST:

• nucleus: positively charged center of an atom according to the cloud model
• jj thomson: scientist who discovered the electron
• billiard ball: model of the atom that was described as being solid throughout with no internal structure
• gold foil: experiment carried out by ernest rutherford
• plum pudding: model that describes atoms as positively charges spheres with negative particles spread throughout
• atoms: all matter consists of _
• democritus: greek philosopher who first used the term "atom"
• electrons: we cannot pinpoint their exact locations, but we can predict where they should be
• definite: law of definite proportions states that atoms can combine in whole number ratios to form compounds
• empty space: atoms are mostly _
• dalton: scientist who created the billiard ball model
• tube: cathode ray _
• energy: when surrounding an atom, electrons will fill the lower _ levels first
• planetary: ernest rutherford used the _ model to describe atoms as a positive nucleus with electrons orbiting around it