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Which of the following elements has the largest ionization energy

User JHollanti
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2 Answers

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18 votes

Answer:

The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

User Casper Kuethe
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20 votes
20 votes

Answer: Oxygen

Step-by-step explanation:

User Angelica Rosa
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