Among the many laser effects have on metal's properties is the conversion of the surface of some metals, such as gold, into a matte black surface by making the outer layer of the metal highly porous and thus able to absorb virtually all light.
rust
Chemical
Rust forming on a metal gate is a chemical change. It is a result of a chemical reaction between iron, oxygen, and water, which leads to the formation of iron oxide (rust).
No change.
What color is beryllium as a pure metal ? Grey-white.
It depends on what metal is 'rusting'.
tarnish or something
rust
Color is a physical property, not a change.
yes
A burning laser will cut the metal
In 1967 the Laser Machines for cutting metal was invented by the British. They discovered the laser assisted oxygen jet cutting laser machine for cutting metals.
it doesnt change the color of the flame.
About 100°C heat can cause it to melt(which is a physical change)
that is because,it depends on the alloys that were used in the metal making. for instance copper is an alloy known to turn green.
What can cause properties of metal to change is by applying heat to it. By this, it makes it a liquid and then over time as it dries, and forms a solid.
Chemical