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

(1 point)
Responses

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.

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.

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

1 answer

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

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

In terms of energy levels:

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

Based on this information, we can conclude:

Francium has fewer valence electrons (1) compared to barium (2).
Francium’s valence electron is in a higher energy level (7) than barium’s (6).

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