Question

Question
Use the periodic table to answer the question.

The periodic table of elements shows element groups, periods, and element properties.

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.
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 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.

Answer 1

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

Reason: Fr is in group 1 (1 valence electron) and period 7 (n=7); Ba is in group 2 (2 valence electrons) and period 6 (n=6).