What are 2 examples and 2 non-examples of pure substances

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.