Answer:
"beyond a reasonable doubt"
Explanation:
Based on the information provided within the question it can be said that the standard that is being described is called "beyond a reasonable doubt". Like mentioned in the question this is a standard in law that states that there is no doubt that the defendant commited the crime based on the evidence that has been presented, and that person must be charged as guilty.
The answer the question is heavy metals because they are all metals i believe