test #4

Question 1

democritus

Answer 1

used the word atomos; particules so small its unbreakable.

Question 2

john dalton

Answer 2

suggested matter made of elements, developped the billiard ball model( atoms are solid spheres)

Question 3

J.J thomson

Answer 3

discovered elctrons, raisin bun model of matte. Negative elctrons balnce positive sphere so atom has no electrical charge

Question 4

Nagaoka

Answer 4

Modeled matter after the solar system; large positive center with negative electrons orbiting around

Question 5

Rutherford

Answer 5

Found evidence of central nucleus; short positive charge particules found mostly empty space and nucleus was that woiuld stop the particules.

Question 6

bohr

Answer 6

electrons orbit is specific shells, electrons jump between shells by gaining or energy.