When an electron is added, energy is released, so electron affinity is given the?
Correct answer: B. Negative sign
- A. Positive sign
- B. Negative sign
- C. Neutral
- D. Delta sign
Explanation
When an electron is added to an atom, energy is released. This means that the electron affinity has a negative sign. The more negative the electron affinity, the more energy is released when an electron is added to the atom, and the more likely the atom is to form an anion. The electron affinity of an atom is measured in kJ/mol. A positive electron affinity means that energy must be added to the atom to add an electron, so it is not favorable for the atom to form an anion. A neutral electron affinity means that there is no energy change when an electron is added to the atom, so it is neither favorable nor unfavorable for the atom to form an anion. So, the answer is negative sign.
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