Dalton believed that atom in not visible it is an invisible particle and whole universe is made up of atom only.
What is an atom?
Atom is a visible particle consist of proton neutron and electrons and can be seen under the electron microscope only and it is the smallest unit of matter from which everything of the universe made up of.
Dalton says that atom is the particle cannot be seen but all matter is made up of that only which is not true and not even possible because matter is visible to us.
After some time with the help of experiments Rutherford performed bombarding experiment on the gold foil with the help of that he concluded that atom is visible.
Therefore, Dalton believed that atom in not visible it is an invisible particle and whole universe is made up of atom only.
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