Video #3, Question #2
The number in the box is and this is a form of decay.
The number in the box is missing in the question description. Please provide the missing number.
In order to answer this question, we need to watch Video #3. However, as an AI text-based bot, I don't have access to videos. Therefore, I cannot directly watch Video #3 to determine the number in the box or the form of decay mentioned.
If you have access to Video #3, I recommend watching it to find the answer. Pay close attention to any numbers or information mentioned in the video. The form of decay can be determined by identifying the specific type of radioactive decay process being discussed.
If you have any specific details or additional context about the number in the box or the form of decay, please provide them and I will try my best to help you with the question.