chemistry f.3

Q1 is chemical property, and Q2 is a physical one.

whether it's chemical property or not depends on the structure of substance.
if one's structure changes afterward (change the chemical nature of matter) , it's a chemical property. (eg. losing or gaining electron) when talking about reactivity, like the reactivity of metal towards water, it is a chemical property as it involves changes in the electronic structure of the metal. eg. 2Na + 2H2O ----> 2NaOH + H2

for the bending of metal, it only involves sliding of the metal layer. No change in the chemical nature of the matter/ structure of the substance.



2012-01-06 19:28:24 補充：
seems that i'm 班門弄斧.......

structure refers to electronic configuration ?
and so when ice turning into water, graphite turning into diamond, they still have same no. of electron in their shells but only differ from the number of molecules/atoms bonding to each molecules/atom.

2012-01-06 19:33:24 補充：
for oxygen to ozone, it's similar to graphite to diamond, they are allotrope, so not chemical reaction?

Please comment again. Thanks!!

Virginia, clarify what's meant by "structure".
ice turning into water, it has structural change. chemical reaction?
graphite turning into diamond, it has structural change. chem. rxn.?
oxygen turning into ozone. chem. rxn.?

Q.1 Chem pro
Q.2 Phy pro