History of the atom Flashcards
What did scientists used to think atoms were?
Solid spheres, then they found electrons
What was created ?
The plum pudding model
What did the scientists do later ?
Carried out an alpha particle experiment- they fired alpha particles onto a thin sheet of gold, they expected the particles to go through them
What did the particles actually do ?
Some particles changed more than expected, some of them went backwards which challenged the plum pudding model
Who changed the model of the atom ?
Niels Bohr, suggested that electrons orbit the nucleus in shells and they have a fixed distance
Who carried out the experiments to find neutrons and protons ?
James Chadwick- he found out that the nucleus can be divided into smaller parts
Who carried out the experiments to find neutrons and protons ?
James Chadwick- he found out that the nucleus can be divided into smaller parts
