Subatomic Particles Quiz: Protons, Neutrons, and Electrons

What is the charge of a neutron?

Who confirmed the presence of neutrons in the nucleus of an atom?

What are the neutrons according to Ernest Rutherford's prediction?

What did Niels Bohr observe when he applied energy to hydrogen gas?

According to Rutherford's prediction, what would happen to the alpha particles if Thomson's model were correct?

What did Rutherford observe about the alpha particles directed at the gold atoms?

What did Rutherford propose about the nucleus of the atom?

In Rutherford's nuclear model, where are the surrounding electrons located in relation to the nucleus?

What is the composition of an alpha particle?

What did Rutherford observe when most of the alpha particles passed through the gold foil?

What did Rutherford reason based on his observations?

What is the role of neutrons in an alpha particle?

Atomic Structure

Neutron has no charge.
The presence of neutrons in the nucleus of an atom was confirmed by James Chadwick.
According to Ernest Rutherford, neutrons are neutral particles with a mass similar to that of protons.

Rutherford's Experiment

Niels Bohr observed that when energy is applied to hydrogen gas, it emits light at specific wavelengths.
If Thomson's model were correct, Rutherford predicted that alpha particles would pass through the gold atoms with little deflection.
Rutherford observed that some alpha particles bounced back when directed at the gold atoms, indicating a small, dense, and positively charged nucleus.
Rutherford proposed that the nucleus is at the center of the atom, surrounded by electrons.

Rutherford's Nuclear Model

In Rutherford's nuclear model, electrons are located far away from the nucleus, with most of the atom's volume being empty space.
An alpha particle is composed of two protons and two neutrons.
Rutherford observed that most of the alpha particles passed through the gold foil with little deflection, indicating that the nucleus is very small compared to the atom's size.
Rutherford reasoned that the nucleus is responsible for the deflection of alpha particles, and that the positive charge of the nucleus is responsible for holding the electrons in their orbits.
Neutrons play a crucial role in an alpha particle, providing stability and structure to the particle.

Test your knowledge about the atomic model and subatomic particles with this quiz. Learn about the contributions of Rutherford and Chadwick, and their discoveries of protons, electrons, and neutrons.