Question

which statement correctly compares the valence electrons for atoms of francium (fr) and barium (ba)?
(1 point)
o barium has more valence electrons, and they are in a higher energy level.
o francium has fewer valence electrons, but they are in a higher energy level.
o barium has fewer valence electrons, but they are in a higher energy level.
o francium has more valence electrons, and they are in a higher energy level.

Explanation:

• Valence electrons determination:
• Francium (\(Fr\)) is in Group 1 of the periodic table. Elements in Group 1 have 1 valence electron.
• Barium (\(Ba\)) is in Group 2 of the periodic table. Elements in Group 2 have 2 valence electrons. So, \(Fr\) has fewer valence electrons than \(Ba\).
• Energy level comparison:
• The period number indicates the energy level of the valence electrons. \(Fr\) is in Period 7 and \(Ba\) is in Period 6. Since 7>6, the valence electrons of \(Fr\) are in a higher - energy level.

Answer:

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