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Use the periodic table to answer the question: Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)? (1 point) Responses

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

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

1 answer

To compare the valence electrons of francium (Fr) and barium (Ba):

  • Barium (Ba) is in group 2 of the periodic table and has 2 valence electrons.
  • Francium (Fr) is in group 1 and has 1 valence electron.

In terms of energy levels:

  • Barium is in the 6th period (energy level n=6).
  • Francium is in the 7th period (energy level n=7).

Thus, although francium has fewer valence electrons (1 compared to barium's 2), its valence electrons are in a higher energy level (n=7 compared to n=6).

The correct statement is: "Francium has fewer valence electrons, but they are in a higher energy level."