Chemistry · Chemical Bonding
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The unit of electron affinity is _________.
- A
J/mol
- B
KJ/mol
- C
KJ/atom
- D
J/atom
Electron affinity is defined as the change in energy "(KJ/mol)" of a neutral atom when an electron is added to the atom to form a negative ion hence the "answer is B".
a) J/mol: This option means that the unit of electron affinity is joules per mole. It represents the energy change when one mole of electrons is added to one mole of atoms or ions.
b) kJ/mol: This option means that the unit of electron affinity is kilojoules per mole. It is the same as option (a), but the energy is expressed in kilojoules, which is a larger unit of energy.
c) kJ/atom: This option means that the unit of electron affinity is kilojoules per atom. It represents the energy change when one electron is added to a single atom.
d) J/atom: This option means that the unit of electron affinity is joules per atom. Similar to option (c), it represents the energy change when one electron is added to a single atom, but the energy is expressed in joules, which is a smaller unit of energy.
Tagged under Chemistry · Chemical Bonding · 2021