Which of the following elements has the highest ionization energy?
Correct Answer: Lithium (Li)
- Step 1: Understand what ionization energy is. It is the energy required to remove an electron from an atom.
- Step 2: Know that elements in the same group (like alkali metals) have similar properties.
- Step 3: Recognize that ionization energy generally increases as you move up a group in the periodic table.
- Step 4: Compare the atomic sizes of the alkali metals. Smaller atoms have higher ionization energy because their electrons are held more tightly.
- Step 5: Identify the alkali metals: Lithium (Li), Sodium (Na), Potassium (K), etc.
- Step 6: Determine that Lithium (Li) is the smallest atom among these alkali metals.
- Step 7: Conclude that Lithium (Li) has the highest ionization energy due to its smaller atomic size.
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