Answer:
The lowest temperature at which a substance melts
Explanation:
A chemical reaction must occur for a compound to have different properties.
Americium is a radioactive element .
- It goes through alpha decay during nuclear reactions .
The nuclear reaction.is given by

Here alpha can be written as He too
1mol—44g/mol
0.10mol—x
x=0.10*44
x=4.4 g