A scientist has a sample of a substance that could be magnesium, sodium, stainless steel, or copper. Name two properties the scientist could use to identify the substance and explain why the scientist could use each property to identify the substance.

The answer to your question is: below

Explanation:

Reaction with water, sodium is very reactive, sometimes explosive with water, so we can identified it from the other metals. Magnesium is less reactive than sodium, but in the presence of water it can produce bubbles.

Then we can identify copper and stainless steel because of the shine and they conduct electricity (conductivity).