23. Which of the following isotopes is suitable to detect blood clothing in a patient’s body?
Antara isotop berikut, yang manakah sesuai digunakan untuk mengesan pembekuan darah dalam badan pesakit?
| Isotopes Isotop | Half-life Separuh hayat |
|---|---|
| P | 10 seconds 10 saat |
| Q | 20 hours 20 jam |
| R | 5 months 5 bulan |
| P | 10 years 10 tahun |
A. If the half-life is 10 seconds, there won’t be sufficient time to perform diagnosis/detection.
C. For a 5 months half-life, it would lead to harmful effects, as it would need 5 MONTHS for the radioactivity to drop to half of its value, imaging the effect on the human’s body.
D. Needless to say, 10 years of half-life would damage the person’s body.
Therefore, with a half life of B. 20 hours (Isotope Q), it would be the most suitable for doctors to perform detection (maybe within 1 hour), where the isotope will decay to half of its original radioactivity after 1 day and rapidly declines in radioactivity over the week - making it safe for the human.
Owhhh okay I understand now, thank you!! 
