Question

why molecule can exists but why not atom?​

Answer 1

Atoms of most elements are not able to exist independently. Atoms form molecules and ions. These molecules or ions aggregate in large numbers to form the matter that we can see, feel or touch.

Answer 2

Explanation:

Molecules are the smallest independent particle of a matter. But on the other hand atoms are not independent molecule because they are not always octet, they often build ions ,positive or negative, which are not stable in real circumstances which.