Question

ionization energy
atomic radius
reactivity
the state or power of being reactive or the degree to which a thing is reactive.
electronegativity

Explanation:

• Ionization Energy: The minimum energy required to remove an electron from a neutral atom or molecule in its gaseous state. It is a measure of how tightly an atom holds onto its electrons.
• Atomic Radius: The distance from the nucleus of an atom to the outermost shell of electrons. It gives an idea of the size of an atom.
• Electronegativity: A measure of the tendency of an atom to attract a bonding pair of electrons. It helps in understanding how atoms will bond with each other.

Answer:

• Ionization Energy: The minimum energy required to remove an electron from a neutral atom or molecule in its gaseous state.
• Atomic Radius: The distance from the nucleus of an atom to the outermost shell of electrons.
• Electronegativity: A measure of the tendency of an atom to attract a bonding pair of electrons.