Thus far (2012) there have been 118 unique elements identified, the most recent being Ununoctium, discovered in 2003.
>> Ununoctium: symbol Uuo, at. no. 118, at. wt. 294 ... it's man made and Radioactive.
An atom is a general term. Elements are specific kinds of atoms that vary by the number of protons they have.
Molecules Atoms which are elements make up molecules. Protons and electrons make up atoms.
Doping is the term used to describe the process of adding atoms of other elements to a semiconductor to alter its electrical properties by rearranging the electrons.
This procedure is called doping.
For atoms, after IUPAC rule, the term used is atomic weight. The unit is "unified atomic mass unit", not included in SI.For molecules the term is molecular (molar) mass. The unit is kg/mol.
doping
The term for the combination of two or more elements to make a compound is called a chemical reaction. This involves the rearrangement of atoms to form new chemical bonds and create a different substance.
The term molecule or compound best defines two or more atoms joined by a chemical bond.
Pure substance can be identified as either elements or compounds. Some examples of pure substance that are elements are sulfur and tin. Pure substances that are compounds are sugar and salt.
In chemistry, the term "organic" refers to compounds that contain carbon atoms bonded to hydrogen atoms, along with other elements like oxygen, nitrogen, and sulfur. These compounds are typically found in living organisms and are essential for life processes.
When 2 or more elements make a chemical bond giving a new material that material wi be a compound,
A chemical combination of two or more elements is called a compound. The simplest unit of a compound is called a molecule (if the atoms are covalently bound) or a formula unit (if the atoms are joined by ionic bonds)