Question

what is atom ? and what is molecular formula ?​

Answer 1

Explanation:

Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol...........

Answer 2

Explanation:

Atom-An atom is the smallest unit of ordinary matter that forms a chemical element.

molecular formula- a chemical formula for a compound existing as discrete molecules that gives the total number of atoms of each element in a molecule the molecular formula for water is H2O — see structural formula — compare empirical formula.