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skelet666 [1.2K]
3 years ago
8

Explain in terns of atomic structure why barium has a lower first ionization energy than magnesium.

Chemistry
1 answer:
Sonja [21]3 years ago
3 0

Answer:

Barium has a greater radius than magnesium

Explanation:

Barium and magnesium are two elements which belong to the same group, group 2A. This means that the two elements have two valence electrons in their outer shell.

The difference is, however, since barium is lower in group than magnesium, it has more electron shells than magnesium and, therefore, its radius is greater. The attraction force between the nucleus and the valence electrons in barium is lower as a result, as force is inversely proportional to distance. Hence, a lower amount of energy is required to remove the valence electrons from barium.

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