The correct answer is option 4. The statement "Atoms aggregate in large numbers to form the matter that we can see, feel and touch" is not correct. Atoms do not aggregate in large numbers to form matter that we can see, feel, and touch. Instead, atoms combine with other atoms to form molecules and compounds, which then make up the matter that we can perceive with our senses.

Option 1 is correct. Atoms can combine with other atoms to form molecules. For example, two hydrogen atoms and one oxygen atom combine to form a water molecule.

Option 2 is correct. Atoms are indeed the basic units from which molecules and ions are formed. Molecules are formed when two or more atoms chemically bond together, while ions are formed when atoms gain or lose electrons.

Option 3 is correct. Atoms are always neutral in nature, meaning they have an equal number of protons (positively charged particles) and electrons (negatively charged particles). This balance of charges gives atoms their neutral overall charge.

In summary, option 4 is not correct. Atoms do not aggregate in large numbers to form the matter we experience; instead, they combine to form molecules and compounds, which then make up the matter we perceive.