Answer:
the answer is three I belive
Answer:
Explanation:
The mass of radioactive isotope at a certain time is given by the following expression:
Time constant can be calculed in terms of half-life:
The initial mass is:
For the noble gasses, you get D, but metals are basically everywhere in the periodic table...
Answer:
D. has different properties when sampled in different areas.
Explanation:
The general property of a mixture says that each substance or component in a mixture has its individual or different property which can be separated on the basis of different methods.
Such as a mixture of oil and water is a heterogeneous mixture and have different properties or different densities, which helps them to be sampled in different areas.
Hence, the correct answer is "D".