Jim drops an iron magnet during a chemistry lab experiment. she finds that it is no longer magnetic. what has happened in terms of its properties?
a. a chemical change occurred that changed the iron in the magnet into nickel.
b. a physical change occurred that changed the iron in the magnet into nickel.
c. a chemical change occurred in which the iron remained iron, but lost one of its chemical properties.
d. a physical change occurred in which the iron remained iron, but lost one of its physical properties.