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.Which of the following elements has the lowest first ionization energy? a.Li

b.Mg
c.Na
d.Al


User Wilber
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1 Answer

3 votes

Answer:

Step-by-step explanation:

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 Justin Kominar
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