The idea of the atom as the building block of matter has developed over time. What was thought of as a single particle about 1 × 10‾¹º m across is now known to be a collection of smaller particles.
The plum pudding model suggests that most of the atom is…
What was the surname of the scientist who suggested the plum pudding model?
What did Ernest Rutherford direct at a thin gold leaf in 1905?
A laser beam
Most alpha particles going straight through the gold foil tells us that …
There is a concentration of mass in the atom
The atom is mostly space
There is a concentration of charge in the atom
What did Niels Bohr add to the Rutherford Atomic model?
The Rutherford scattering experiment proved the existence of what?
Who discovered the neutron?
Why did Rutherford use gold foil in his experiment?
Gold makes the apparatus look nice
Gold can be made very thin
Gold is shiny
In the current model of the atom, what are the two particles that are present in the nucleus?
Protons and electrons
Protons and neutrons
Neutrons and electrons
How many times bigger is the atom compared to the nucleus?