Question

How many atoms are in the universe?

Answer 1

Hint: The concept of the Big Bang theory and also the approximate galaxies found till now and accordingly the estimated value for the number of atoms in the universe calculated which is called as the observable universe will lead you to the required answer.

Complete answer:
In the lower classes of chemistry, we have dealt with the topics which relate to the atoms and its structure and properties and also its composition where this gives information about what atoms are made up of.
We shall focus on the atom in detail so that we can deduce the required answer.
- An atom is the smallest particle that exists and is a matter that forms an element. Atoms are extremely small and are of about 100 picometers across in size.
- Atoms are composed mainly of a central nucleus in which the protons and neutrons are concentrated in it. Protons are the positively charged species and neutrons are the neutral species.
- Around this nucleus, the electrons that are the negatively charged species revolve in a circular orbit where the number of protons are always equal to the number of electrons.
- If we consider this tiny atom in the whole universe it goes up to the uncountable form.
But according to some of the scientists, the proposed atomic scale which as the matter on the smallest scales it was believed that between 120-300 sextillion that is $1.2\times {{10}^{23}}to3.0\times {{10}^{23}}$ stars exist within our observable universe.
- Therefore, at this level the estimated value of atoms are between ${{10}^{78}}to{{10}^{82}}$ in the observable universe.

Note:
Note that the matter in the universe cannot be determined exactly and also the exact atoms cannot be determined. The values given are the predictable and the approximate guessed values by the scientists.