Jim drops an iron magnet during a chemistry lab experiment. He finds that it is no longer magnetic. What has happened in terms o
f its properties?a. A physical change occurred in which the iron remained iron, but lost one of its physical properties. b. A physical change occurred that changed the iron in the magnet into nickel. c. A chemical change occurred that changed the iron in the magnet into nickel. d. A chemical change occurred in which the iron remained iron, but lost one of its chemical properties.
A physical change occurred in which the iron remained iron, but lost one of its physical properties
Explanation: magnetization and demagnetization is a physical change as no new substance is form and it is easily reversed. When an iron rod is magnetized, it can loss it magnetic property by hitting it. So when an iron rod which is magnetized falls from a height it can also loss its magnetic property
The answer is Strontium(Sr). The reactive increase from right to left. And this element has two valence electrons. So Rb is not correct. Then the very reactive metal is Sr.
