1- Tarnishing Flashcards
1
Q
why is gold used in jewelry?
A
it doesn’t change, not even over a long period of time
2
Q
what is it called when metals change their appearance from a shiny to a dull colour?
A
tarnishing
3
Q
what is tarnishing?
A
a discoloration caused by the reaction between the metal and oxygen. it is an oxidation reaction
4
Q
what can happen if you leave detergent or polish on the surface of the metal?
A
it attracts moisture and causes corrosion
5
Q
which metals tarnish especially quickly?
A
lithium, sodium and potassium tarnish quickly (all very reactive!)
