12.Which of the following elements has the highest ionization energy and why?
a. Argon because it has more protons in the nucleus.
b. Argon because it has a full valence shell.
c. Chlorine because it only needs one valence electron to fill its valence shell.
d. Chlorine because it attracts electrons better.
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12.Which of the following elements has the highest ionization energy and why?
a. Argon because it h...
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