A physical change doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed as well as new energy.
The definition in Volume is a the amount of space a substance or object occupies, or that is enclosed within a container, especially when great. For example "The sewer could not cope with the volume of rainwater" . You can say it in different ways, such as capacity, size, magnitude, mass, bulk, extent and more. I hope this helps :-).
1.54 x 10^-10 (ten to the negative tenth power)
Ionic bond is the bond that creates a crystalline structure
It is OH- (hydroxide ion)
