Valence electrons are the highest energy electrons in an atom.
The energy required to remove an electron from a neutral atom is the atom's ionization energy. It represents the amount of energy needed to remove the most loosely bound electron from an atom in its gaseous state.
in the third shell, an electron has more energy and is further from the nucleus
The energy released on adding an electron to an isolated gas phase atom is called electron affinity. It represents the willingness of an atom to accept an additional electron. The process can release energy if the atom's electron affinity is negative, indicating that the atom is stable after gaining an electron.
The electrons on the outtermost energy level of an atom is called a valence electron.
the energy is require to remove an electron from an atom (ionization energy) but when electron is absorbed in an atom energy is released (electron affinity) however 2nd electron affinity is endothermic ,energy is require.
The electron is most responsible for the size of an atom because it occupies the space around the nucleus in electron clouds. The number of electrons and their energy levels determine the size of an atom.
Electrons in the outermost electron shell have the most energy in an atom. The energy of an electron increases as it moves further away from the nucleus. Electrons in the innermost shell have the least energy, while electrons in the nucleus have the highest energy due to their proximity to the protons.
the lowest energy level occupied by an electron when an atom is in its most stable energy state
The first ionization energy is the energy required to remove the outermost (most loosely held) electron from a neutral atom in its gaseous state. It is a measure of how strongly an atom holds onto its electrons, with higher ionization energies indicating a stronger hold.
it is the energy required for a mole of atom to loose a mole of electron.
That would be the electron cloud. This is like the orbital model where there are electrons in each orbit level but the electron's location can not be predicted so it is said to be most likely at a point in the electron cloud.
Most electron affinities are negative because when an electron is added to an atom, energy is released. This released energy causes the system to become more stable, resulting in a negative change in energy. The negative sign indicates that energy is released during the process.