The size of an atom is significantly smaller compared to the Earth. Atoms are the basic building blocks of matter and are incredibly tiny. The size of an atom is usually measured in terms of its atomic radius, which represents the distance from the nucleus to the outermost electron shell.
To provide a sense of scale, let's consider the approximate size of an atom compared to the Earth. The radius of the Earth is about 6,371 kilometers (or 6,371,000 meters). In contrast, the typical atomic radius ranges from fractions of a nanometer (10^(-9) meters) for small atoms to a few angstroms (10^(-10) meters) for larger atoms.
For example, the atomic radius of hydrogen, the smallest atom, is about 0.053 nanometers (or 0.53 angstroms). Comparing this to the Earth's radius, we can see that an atom of hydrogen is roughly 10 billion times smaller than the Earth.
It's important to note that this is a simplified comparison, and the sizes of atoms can vary depending on the element and its specific atomic structure. Nevertheless, the general idea is that atoms are incredibly small in comparison to macroscopic objects like the Earth.