Answer:
1 g
Explanation:
The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.
We can make a table of the mass left after each half-life.

The mass remaining after 48 h is 1 g.
Atoms combine<span> by forming chemical bonds</span>
The answer is D, because "Animals without a backbone are invertebrates."
Answer:
Always carry the microscope with two hands. One on the arm and one underneath the base of the microscope.