Question

From the electron distribution of the following elements, determine the number each of their valence electrons.

1. Cesium - 55

2. Iodine - 54

3. Gallium - 31

4. Polonium - 84

5. Indium - 49

Answer 1

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1.Cesium Number of Valence Electrons

Cesium Number of Valence ElectronsCesium has eight valence electrons in its outer shell.

2.Iodine, as with all of the Halogens, has 7 valence electrons.

3.Gallium is a chemical element with symbol Ga and atomic number 31. , density) of 5. ..

. The number of electrons in each of Gallium's shells is 3

4.polonium has 6 valence electrons in its outer shell.

5.Indium has 3 valence electrons in its outer shell.

Answer 2

Answer:

1. Cesium has 1 valence electron.

Cesium = 55

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1

(6s1) = 1

2. Iodine has 7 valence electrons.  

Iodine = 53

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5

(5s2 5p5  ) 2+5 = 7

3. Gallium has 3 valence electrons.

Gallium = 31

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p1

(4s2 4p1) 2+1 = 3

4. Polonium has 6 valence electrons.

Polonium = 84

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p4

(6s2 6p4) 2+4=6

5. Indium has 3 valence electrons.

Indium = 49

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p1

(5s25p1) 2+1 = 3