What is the trend for ionization energy across a period in the periodic table?
-
Increases from left to right.
- Remains constant
- Varies randomly
- Decreases from left to right
The correct answer is: A
Explanation
Ionization energy generally increases from left to right across a period. Ionization energy is the energy required to remove an electron from a neutral atom, and as you move from left to right, the atomic size decreases, making it harder to remove an electron, and thus, the ionization energy increases.
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