Magnetizing is a physical process.
To magnetize metal, you can rub a magnet along the metal in one direction multiple times. This will align the magnetic domains in the metal, making it magnetic.
No its not a metal.
No. There is no metal in a diamond to magnetize.
Physical change
chemical
physical
Physical Changes in metal are: melting bending and rusting
Corrosion is a chemical change
No, it is a chemical change. The metal oxide formed is a new substance.
chemical
chemical
It is a physical change because you are changing the shape of the metal.