The video tutorial explains the structure of atoms, focusing on subatomic particles: protons, neutrons, and electrons. It describes their mass and charge, and how they are arranged within the atom. The tutorial also covers the historical Plum Pudding Model and how Rutherford's experiment led to the development of the nuclear model of the atom.

Which subatomic particles are located in the nucleus of an atom?

• Electrons only

• Protons and neutrons

• Neutrons and electrons

• Protons and electrons

What is the relative charge of a neutron?

• -1

• 0

• +2

• +1

What happens to an atom when it loses or gains an electron?

• It becomes a proton

• It remains unchanged

• It becomes a neutron

• It becomes an ion

In the Plum Pudding Model, how were electrons arranged?

• In a dense nucleus

• Randomly scattered within a sphere of positive charge

• In energy levels around the nucleus

• In fixed orbits around the nucleus

What was the key finding from Rutherford's gold foil experiment?

• Electrons are in fixed orbits

• Atoms are indivisible

• Atoms have a dense, positively charged nucleus

• Atoms are mostly empty space