Respuesta :
Answer:
Ar
Explanation:
Electron affinity and electron negativity both have the same trend of decreasing down a period. If the electron negativity is 0 than the electron affinity is also 0
Argon(Ar) has an electron affinity measuring closest to zero.
Electron affinity It is the degree at which an electron is added to a neutral atom or molecule. That is, the ability of an atom or molecule to accept electrons
Argon is a group 0 element with a complete octet structure. It rarely combines with other atoms or elements. That is, it rarely gains or loses electrons.
This means that argon has a very low electron affinity because of its unreactive nature.
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