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Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?

(1 point)
Responses

Francium has fewer valence electrons, but they are in a higher energy level.
Francium has fewer valence electrons, but they are in a higher energy level.

Francium has more valence electrons, and they are in a higher energy level.
Francium has more valence electrons, and they are in a higher energy level.

Barium has more valence electrons, and they are in a higher energy level.
Barium has more valence electrons, and they are in a higher energy level.

Barium has fewer valence electrons, but they are in a higher energy level.

1 answer

To evaluate the valence electrons of francium (Fr) and barium (Ba), we should first consider their positions in the periodic table.

  • Barium (Ba) is in Group 2 (the alkaline earth metals) and has 2 valence electrons.
  • Francium (Fr) is in Group 1 (the alkali metals) and also has 1 valence electron.

Now, looking at their energy levels:

  • Barium is located in the 6th period, while francium is in the 7th period. This indicates that francium’s valence electrons are in a higher energy level than barium's.

Based on this information, the correct comparison is:

Francium has fewer valence electrons, but they are in a higher energy level.

So, the first statement is correct:

Francium has fewer valence electrons, but they are in a higher energy level.