Question

what is the energy required to remove an electron from an atom in the gaseous state called?
electronegative energy
nuclear energy
ionization energy
shielding energy

Explanation:

• Electronegative energy: This term is not a standard one in chemistry. Electronegativity is a measure of an atom's tendency to attract electrons in a chemical bond, not an energy related to removing an electron.
• Nuclear energy: Nuclear energy is related to the energy released from nuclear reactions (such as fission or fusion) in the nucleus of an atom, not to the removal of an electron from an atom.
• Ionization energy: By definition, ionization energy is the energy required to remove an electron from an atom in the gaseous state. For example, for the reaction \(M(g)

ightarrow M^{+}(g)+e^{-}\), the energy change for this process is the ionization energy.

• Shielding energy: Shielding (or screening) is a phenomenon where inner - shell electrons reduce the effective nuclear charge experienced by outer - shell electrons. It is not an energy term for electron removal.

Answer:

C. ionization energy