The amount of energy required to remove the outermost electron from a gaseous atom in the ground state is known as [tex]\boxed{\left( 1 \right){\text{ first ionization energy}}}[/tex].
Further Explanation:
(1) Ionization energy:
The amount of energy needed for the removal of the most loosely bound valence electrons from the isolated neutral atom of the gas. It is generally represented by IE. It is related to the ease with which the electrons can be removed. More easily the electrons are removed; smaller will be the ionization energy and vice-versa.
Ionization energy is further classified as first, second and so on ionization energies, depending on the number of electrons being removed. The energy required to remove the outermost electron from the gaseous atom is called the first ionization energy, denoted as [tex]{\text{I}}{{\text{E}}_{\text{1}}}[/tex]. Similarly, the energies for removal of second and third electrons are known as second and third ionization energies respectively.
(2) Activation energy:
It is the minimum amount of energy that the reacting species should possess in order to undergo a chemical reaction.
(3) Conductivity:
The ability of any substance to conduct electric current through it is called conductivity. It can be ionic or electrolytic conductivity.
(4) Electronegativity:
The tendency of an atom to attract the shared electron pair towards itself is known as electronegativity. The elements that possess such property are known as electronegative elements.
Therefore the correct option is 1.
Learn more:
- Rank the elements according to first ionization energy: https://brainly.com/question/1550767
- Write the chemical equation for the first ionization energy of lithium: https://brainly.com/question/5880605
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: first ionization energy, electronegativity, activation energy, conductivity, IE, IE1, electric current, electron pair, chemical reaction, isolated, neutral, gaseous atom.
