its a physical change hope i helped in time :D
Yes: water as liquid, solid, gas has the same chemical formula and properties. And this is valid for all substances.
Physical Change
A physical change has just occurred.
When a substance changes but still retains its original properties, the change is called a physical change. If it didn't retain its original properties, then it went through a chemical change.
retains its own properties.
A molecule is the smallest particle of a compound that still retains its properties. An atom is the smallest particle of an element that still retains its properties.
it is the quarks
I believe you are talking about a mixture. A mixture is a physical blend of two or more substances where each substance retains its own properties. Since they keep their properties, mixtures can be separated into their original individual substances. Example: If you had a mixture of salt and sand, you could separate them by pouring the mixture into a container of water. Salt is soluble in water and will dissolve. You can then pour the salt water through a filter, capturing the sand. Then, by evaporating the water, the salt will be left.
When a substance changes but still retains its original properties, the change is called a physical change. If it didn't retain its original properties, then it went through a chemical change.
The smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms is a molecule.
Element
mixture
An atom of that element.
An element has distinct chemical properties that are created by the unique interaction of its protons, neutrons and electrons. The smallest unit that retains this is the atom.
a mixture 99% sure
It is a mixture, because everything in it retains their characteristic properties.
retains its own properties.
catalyst
A compound
The smallest part of substance that still retains the properties of that compound is called an atom. All things are made of atoms.