A single kind of matter that has a distinct physical and chemical properties is called?
Pure substance.
element
An atom represents the smallest particle that retains unique chemical properties.
Properties of Compounds A compound has unique properties that are distinct from the properties of its elemental constituents.
Hydrogen is the element with unique properties that doesn't fit in any group.
Sodium chloride is it an entirely different substance with its own unique properties.
Stuff
This particle is the atom.
It is unclear what you mean by "just matter." Yes, oxygen is a substance and it is made of matter, but, like any other chemical substance it has its own unique set of properties.
The law of conservation of matter/mass applies to chemical reactions. This is why chemical equations must be balanced. The matter that goes into a chemical reaction is present in the products of the reaction, but the atoms have been rearranged to form products with new and unique properties different from the reactants.
It is an element.
A molecule is the smallest unit of a pure substance that can exist and still retain its chemical properties. An atom is the smallest unit of an element that can exist and still retain its chemical properties.
as the elements in a group have the same number of valence electrons, their chemical properties will be similar (with few exceptions of course)
An atom represents the smallest particle that retains unique chemical properties.
I am really sorry this question needs much more information or needs to be much more specific - each chemical compound is unique and will have unique properties
A chemical change always changes the chemical composition of the reactants to produce products with new and unique properties, different from the reactants.
Einsteinium is not so unique; any chemical element has interesting properties or applications.A curious fact about Es: was identified in the debris from the nuclear test in Eniwetak.
A substance that has properties different from the chemical elements in it is a chemical compound. A chemical compound is built from chemical elements that are chemically bonded together. And the "finished product" will have chemical properties that are unique to that compound, and different from the properties of the substances that make it up.
A physical change is one in which the chemical composition of the substance does not change. A chemical change is one in which new products are formed with their own unique chemical compositions and properties.