Positron Emission and Radioactive Decay

The video tutorial explains how to balance equations for radioactive decay, focusing on positron emission. It describes the process where a proton breaks into a positron and a neutron, affecting the atomic and mass numbers. The tutorial guides viewers through determining the new atomic number and chemical symbol, using the periodic table to identify the element as oxygen. The mass number remains unchanged due to the neutron's presence. The final balanced equation is presented, illustrating the transformation from fluorine-18 to oxygen-18.

What type of radioactive decay does Fluorine-18 undergo in the given problem?

• Gamma decay

• Alpha decay

• Beta decay

• Positron emission

During positron emission, a proton transforms into which of the following?

• An alpha particle

• A positron and a neutron

• An electron and a neutron

• A neutron and a gamma ray

In the context of radioactive decay, what is a positron?

• A neutral particle

• A positively charged electron

• A negatively charged particle

• A heavy particle

What is the role of the neutron in the nucleus after positron emission?

• It transforms into a proton

• It transforms into an electron

• It remains in the nucleus

• It is ejected from the nucleus

After positron emission, what is the new atomic number of the element?

• 8

• 7

• 9

• 10

Which element is represented by the atomic number 8?

• Nitrogen

• Neon

• Oxygen

• Fluorine

What happens to the mass number when a proton is lost during positron emission?

• It increases by one

• It decreases by one

• It remains the same

• It doubles

Why does the mass number remain unchanged after positron emission?

• An electron is lost

• A neutron is lost

• A proton is gained

• A neutron is gained

What is the final balanced equation for the decay of Fluorine-18?

• 18 F 9 → 19 O 8 + positron

• 18 F 9 → 18 N 7 + positron

• 18 F 9 → 17 O 8 + positron

• 18 F 9 → 18 O 8 + positron

Which of the following is not a result of positron emission?

• Loss of a proton

• Change in atomic number

• Change in mass number

• Gain of a neutron