Acidity is a chemical property.
chemical property.
Reactivity is a chemical property (in chemistry !).
If something reacts with oxygen that is a description of a chemical property.
chemical property
Floating is a physical property, and is not a 'change' in any sense.
Chemical property
it is chemical change
It is a physical property. Any gas that has a lower density than air will float above air. This is similar to how if you pour oil into water. The oil will float on the water because it is less dense.
Acidity is a chemical property.
chemical property
Density is a physical property; the unit in SI is Mg/m3. Materials with density under 1 float on water.
chemical property
It's a chemical property
Chemical property because acid is a chemical
No, flammability is a chemical property.
chemical property.Flammability is a chemical property (reaction with oxygen=oxydation).