Answer
a. 1 electron.
b. 2 electrons.
c. 3 electrons.
d. 1 electron.
e. 2 electrons.
Work Step by Step
1. Determine the amount of valence electrons.
a. Li. Group 1A of the periodic table: 1 valence electron.
b. Ca. Group 2A of the periodic table: 2 valence electrons.
c. Ga. Group 3A of the periodic table: 3 valence electrons.
d. Cs. Group 1A of the periodic table: 1 valence electron.
e. Ba. Group 2A of the periodic table: 2 valence electrons.
2. Since all these elements are metals, they need to lose all their valence electrons to get a stable electron configuration.