carol accidentally dropped a container of salt and sodium chloride, into a container of a dark grey metal. carol is pretty sure that the gray metal is iron fillings. using the table above, help carol seperate the two substances

Explanation:

The best way to separate the mixture is by using a bar magnet. We explore the magnetic property of the iron fillings in the mixture to separate it out.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.