What Is An Atom ? | How Was It Discovered?

What is an atomic clock? How does it work?

How was penicillin discovered?

Which part of an atom was discovered by Rutherford's alpha particle scattering experiement ?

Which series of Hydrogen atom was first discovered?

The existence of a positively charged nucleus in an atom was discovered by

(a) What is an atom ? How do atoms usually exist ? (b) What is a molecule? Explain with an example. (c ) What is the difference between the molecule of an element and the molecule of a compound ? Give one example of each.

What is the name of recently discovered allotropes of carbon?