Question

Elements with ________________ first ionization energies and ___________ electron affinities generally form cations.
a. low, very negative
b. high, positive or slightly negative
c. low, positive or slightly negative
d. high, very negative e. None of the above is generally correct.

Answer 1

Answer:

c. low, positive or slightly negative

Explanation:

Elements with low first ionization energies and positive or slightly negative electron affinities, generally form cations. Metals are less likely to gain electrons, but can easily lose their valence electrons to form cations. This means the ionization energy, which is the energy required to remove loosely bound electrons is low. For a metal to gain an electron, an endothermic reaction occurs, and since the pull by the nucleus on electrons is low, it means metals have a low electron affinity.

Answer 2

Elements with low first ionization energies and positive or slightly negative electron affinities generally form cations.

What are Cations?

These are referred to ions with a net positive charge. They are formed when elements have low first ionization energies.

The presence of a positive or slightly negative electron affinities also enhanced their formation thereby making option C the most appropriate choice.

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