Iron has magnetic properties, so you would just need to hold a magnet over the mixture and the filings will come right out.
Answer:
atoms or electrons
Explanation:
but l guess electrons is the best answer
Answer:
There are three ways that scientists have proved that these sub-atomic particles exist. They are direct observation, indirect observation or inferred presence and predictions from theory or conjecture. Scientists in the 1800's were able to infer a lot about the sub-atomic world from chemistry.
Explanation:
Hope this helps
I would think the last one about the ozone layer
