Question

write short not on the following 1. Atoms
2. compound and lons
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Answer 1

Explanation:

Atoms- Atoms are the smallest particle of an element which may or may not have independent existence.

Compound- It is a combination of two or more elements. For example H2O the chemical formula of water

Sorry I don't know about ion

Answer 2

Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements..

The atoms of the various chemical elements can be likened to the letters of the alphabet: just as the letters of the alphabet are combined to form thousands of words, the atoms of the elements can combine in various ways to form a myriad of compounds. In fact, there are millions of chemical compounds known, and many more millions are possible but have not yet been discovered or synthesized. Most substances found in nature—such as wood, soil, and rocks—are mixtures of chemical compounds. These substances can be separated into their constituent compounds by physical methods, which are methods that do not change the way in which atoms are aggregated within the compounds. Compounds can be broken down into their constituent elements by chemical changes. A chemical change (that is, a chemical reaction) is one in which the organization of the atoms is altered. An example of a chemical reaction is the burning of methane in the presence of molecular oxygen (O2) to form carbon dioxide (CO2) and water.

CH4 + 2O2 → CO2 + 2H2O