Charged chemical species composed of two or more bonded atoms are called _________.
A substance that is composed of two or more elements, chemically combined with one another in a fixed proportion is called a ____.
The chemical bond that is formed between two combining atoms by mutual sharing of one or more pairs of electrons is called a ___.
A ___________ is formed when two or more atoms bond chemically.
The substance that is composed of two or more elements that are chemically combined with one another in a fixed proportion by mass is called ___