A valance electron.
an electron loosely bound to its nucleus is called a free electron.
Materials in which the electrons are loosely bound are called conductors.
Organisms that do not have membrane-bound organelles, including a nucleus, are called Prokaryotic.
Prokaryotes do have DNA, it just is not contained within a nucleus. It is loosely bound within the prokaryote.
C. Be. Beryllium.
An escaped electron is called a FREE electron, simple as that. It means: not bound or belonging to a particular atom (or ion)
eukaryote
No, the electrons do not have nuclear energy, they are not part of the nucleus. They have binding energy which keeps them attached to the nucleus as part of the atom. When an electron is bound to an atom, it has a potential energy that is inversely proportional to its distance from the nucleus. This is measured by the amount of energy needed to unbind the electron from the atom, and is usually given in units of electronvolts (eV). In the quantum mechanical model, a bound electron can only occupy a set of states centered on the nucleus, and each state corresponds to a specific energy level. The lowest energy state of a bound electron is called the ground state, while an electron at a higher energy level is in an excited state. The binding energy of electrons is many orders of magnitude less than the binding energies in the nucleus, and atoms are easily ionised by stripping off electrons.
In the Membrane bound nucleus
The single outer electron is further away from the nucleus and thus is less tightly bound and thus it is energetically easier to remove that electron
The outer shell is the valence electrons and they are very loosely bound to the nucleus - less force by the nucleus on the valence electrons, so valence shell's electrons are exchanged first in any reaction.
A prokaryote is a single-celled organism that lacks a membrane-bound nucleus (karyon), mitochondria, or any other membrane-bound organellesIt is the Eukarotes that have membrane-bound organelles.