Descovery Of The Atom Flashcards
Who discovered the first model of the atom, and what was it described as?
John Dalton - atoms where solid spheres
How was the solid sphere theory proved wrong? And by who.
J Thomson found them to not be solid spheres but they contained negative charges - electrons
What was the Plum Pudding theory?
It was the idea that an atone was a cloud of positive charge that contained scattered electrons
How did Rutherford disprove the plum pudding theory?
He used the Alpha Scattering Particle experiment and where the particles where expected to pass straight through some bounced back, therefore concluding there must be a positively charged nucleus that is surrounded by electrons.
How did Bohrs model further develop the Atom model?
He concluded that there were fixed shells in which the electrons where placed and orbited around the nucleus.
