Which statement correctly compares the valence electrons for atoms of francium (Fr) and Barium (BA)
(1 point)
• Barium 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.
• 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.
Barium has more valence electrons, and they are in a higher energy level.
To compare the valence electrons for atoms of francium (Fr) and barium (Ba), we need to understand the electronic structure of these elements.
Valence electrons are the electrons in the outermost energy level (also known as the valence shell) of an atom. These electrons are involved in chemical bonding and determine an element's chemical properties.
To find the number of valence electrons, we can look at the group (column) of the periodic table in which the element is located.
Francium (Fr) is in Group 1 of the periodic table, which means it has one valence electron. The valence shell of francium is the seventh energy level.
Barium (Ba) is in Group 2 of the periodic table, which means it has two valence electrons. The valence shell of barium is the sixth energy level.
Comparing the number of valence electrons, we can conclude that francium (Fr) has more valence electrons than barium (Ba). Therefore, the correct statement is:
• Francium has more valence electrons, and they are in a higher energy level.