Question

1. in what family would each of these elements be classified? radium - __________ tin - ________ iodine - ________ cesium - ________ 9. predict the number of valence electrons for each element based on its location in the periodic table of elements. you will need to use the table in your textbook. barium = __ lead = __ bismuth = __ potassium = ____

Explanation:

Step1: Recall element families

Elements are classified into families based on their properties and positions in the periodic table.

Step2: Classify Radium

Radium is in Group 2, so it is an alkaline - earth metal.

Step3: Classify Tin

Tin is in Group 14, it is a post - transition metal.

Step4: Classify Iodine

Iodine is in Group 17, it is a halogen.

Step5: Classify Cesium

Cesium is in Group 1, it is an alkali metal.

Step6: Recall valence - electron rule

For main - group elements, the number of valence electrons is equal to the group number (for groups 1 - 2 and 13 - 18).

Step7: Find valence electrons of Barium

Barium is in Group 2, so it has 2 valence electrons.

Step8: Find valence electrons of Lead

Lead is in Group 14, so it has 4 valence electrons.

Step9: Find valence electrons of Bismuth

Bismuth is in Group 15, so it has 5 valence electrons.

Step10: Find valence electrons of Potassium

Potassium is in Group 1, so it has 1 valence electron.

Answer:

1. Radium - Alkaline - earth metal

Tin - Post - transition metal
Iodine - Halogen
Cesium - Alkali metal

1. Barium = 2

Lead = 4
Bismuth = 5
Potassium = 1