What is the smallest particle which prossesses the properties of a compound called?

Molecule

Explanation:

Compounds are chemical substances comprising of two or more elements. The smallest particle contained in a compound is the MOLECULE. Molecules are combinations of atoms (same or different) of an element held together by a chemical bond.

Since a compound is a molecule with two or more elements combined, the chemistry of the molecules contained in a compound determines its chemical properties. This means that the molecules of a compound are responsible for the interactions of a compound in a chemical reaction. Examples of molecules are H2O, N2, O3 etc.

there is none because earth is stationary and flat.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;