Exploring Stable and Unstable Nuclei in Radioactivity

The video tutorial explains atomic stability and radioactive decay. It describes the structure of an atom, focusing on protons, neutrons, and electrons, and how the strong nuclear force determines stability. Unstable nuclei undergo radioactive decay to achieve stability, emitting radiation through alpha, beta minus, or beta plus decay. The video also explains how to determine an atom's stability using a proton-neutron graph, highlighting the stability line. It concludes with a recap of the key points discussed.

What are the subatomic particles that make up an atom?

• Protons, Electrons, and Quarks

• Protons, Neutrons, and Electrons

• Protons, Neutrons, and Photons

• Neutrons, Electrons, and Quarks

What force holds the protons and neutrons together in the nucleus?

• Gravitational Force

• Electromagnetic Force

• Strong Nuclear Force

• Weak Nuclear Force

What is radioactive decay?

• The process of a stable nucleus emitting radiation

• The process of an unstable nucleus giving off excess protons or neutrons

• The process of an atom losing electrons

• The process of an atom gaining protons

What happens to the atomic number of an atom during alpha decay?

• It increases by two

• It decreases by two

• It remains the same

• It increases by one

What is an alpha particle composed of?

• Two neutrons and two positrons

• Two protons and two electrons

• Two neutrons and two electrons

• Two protons and two neutrons

During beta minus decay, what does a neutron change into?

• A neutron and a positron

• A neutron and an electron

• A proton and an electron

• A proton and a positron

What is a positron?

• A particle with the same mass as a proton but a positive charge

• A particle with the same mass as a proton but a negative charge

• A particle with the same mass as a neutron but a positive charge

• A particle with the same mass as an electron but a positive charge

How can we determine if a radioisotope is likely to decay?

• By its position on a proton-neutron graph

• By its atomic mass

• By its temperature

• By its color

What type of decay is likely for a radioisotope with too many neutrons?

• Beta plus decay

• Gamma decay

• Beta minus decay

• Alpha decay

What type of decay is likely for a radioisotope with more than 82 protons?

• Alpha decay

• Gamma decay

• Beta minus decay

• Beta plus decay