Examlex
A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay.If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?
Sealed Bag
A bag designed to be completely closed, ensuring that its contents are kept secure and uncontaminated.
Paper Towels
Absorbent disposable towels made from paper, used for drying hands, wiping surfaces, or cleaning up spills.
Fixative
A chemical substance used in microscopy and histology to preserve tissues or cells by stabilizing their structure.
Dissecting Tray
A flat, usually metal or plastic, tray used to hold specimens for dissection.
Q6: _ is the metallurgy procedure carried out
Q8: What are the primary pollutants from automobile
Q8: Which statement is correct about transition metals?<br>A)
Q21: What is the change in entropy for
Q28: How is atmospheric oxygen removed from the
Q28: Two well-known complex ions containing Ni are
Q46: What element is the stable end-product of
Q51: Predict the sign of ΔS for the
Q82: What is the concentration of OH<sup>-</sup> in
Q118: How many 3d electrons does a ground-state