Question

Determine the number of valence electrons in an atom of each element. a. Ba b. Cs c. Ni d. S

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The valence electron of an element can be determined by its group number in the periodic table. So, in the third row of the periodic table:

a. Since Barium (Ba) is in a group 2 of the periodic table, then its valence electron is 2.

b. Since Cesium (Cs) is in group 1 of the periodic table, then its valence electron is 1.

c. Since Nickel (Ni) is in group 10 of the periodic table, then its valence electron is 10.

d. Since Sulfur (S) is in group 6 of the periodic table, then its valence electron is 6.

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