How many atoms are in the universe?

You may find the necessary answer by using the Big Bang hypothesis, approximate galaxies discovered thus far, and the estimated number of atoms in the universe (referred to as the observable universe) that was determined..

The smallest unit of a substance known as an atom is a component of an element. Atoms are around 100 picometers across, which is quite small.

Protons and neutrons are concentrated in the core nucleus of an atom, which makes up the majority of an atom. Neutrons are the neutral species, while protons are the positively charged species.

The negatively charged species known as electrons orbit this nucleus in a circular orbit where the number of protons and electrons is constant.

This little atom rises to the uncountable form when we put it in the context of the entire universe.

However, some scientists asserted that the number of stars in our observable universe ranges from 120 to 300 sextillion, based on the proposed atomic scale, which represents stuff at the smallest scales. As a result, it is estimated that there are between ${10}^{78}-{10}^{80}$ atoms at this level in the observable universe.

As a result, choice A is correct.