The electron cloud of an atom has a size of roughly 1 Å
(Ångstrom or 10 m). A nucleus has a size of about 1 fm
(femtometer or fermi or 10 m). A century or so ago, some
people believed that each neutron in the nucleus consisted of a
proton and a electron. That explained beta decay, in which the
nucleus emits an electron. It also avoided the need for a third
type of particle to exist besides the already known protons and
electrons. Why do you believe the possibility that nuclei would
contain electrons is unlikely?
2
A nano-technologist at the University of Florida claims to have
developed a revolutionary technique that allows the exact
measurement of linear momentum of electron pairs in a quantum dot.
What do you claim?