Question

What is atomic mass unit?
How do atoms exist?

Answer 1

Somehow ohhhhhhh get rekt no but seriously you can find the answer on Google sorry for answering like this

Answer 2

Define atomic mass unit. State how do atoms exist? Atomic mass unit (amu) is defined as the mass unit equal to exactly 1/12th of the mass of one atom of C-12 isotope. Atom may exists independently in free state (e.g. He, Ne and Ar) or in combined state.