From kinetic theory, the size
of an atom was known to be 10–10 m,
about 10,000 to 100,000 times larger
than the size of the nucleus (see Chapter 10, Section 10 6 in Class XI
Physics textbook) Thus, the electrons would seem to be at a distance
from the nucleus of about 10,000 to 100,000 times the size of the nucleus
itself Thus, most of an atom is empty space