plz define this question??
Answers
Answer:
Atom=An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Molecule = molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
Atomicity = Atomicity is defined as the total number of atoms present in a molecule. For example, each molecule of oxygen is composed of two oxygen atoms. So atomicity of oxygen is 2. In older contexts, atomicity is sometimes used in the same sense as valency.
Valency = In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.
Explanation:
Atom : smallest particle of a chemical element that can exist
Molecule : Formed Compound when One or more atoms combined
Atomicity : Number of atoms present in a compound
Velency : Number of electrons that an atom can gain or loss
Compound Ion : Charged Compounds