Answer: A neutral atom gains an electron.
- A A neutral atom gains an electron
- B A cation loses an electron
- C An atom forms a cation
- D Two atoms bond
Correct answer: A. A neutral atom gains an electron
Explanation: Electron affinity measures the energy change when a neutral gaseous atom gains an electron to form an anion.
The complete modern periodic table (118 elements). Image: Cepheus et al., Public Domain, via Wikimedia Commons.
Concept context
The periodic table organises all 118 elements by atomic number and similar properties. Study periodic trends like atomic radius, ionization energy, and electronegativity, and learn how an element's position predicts its behaviour.
Read the full Classification of Elements and Periodicity in Properties notes →