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Solution: Four of the boxes in the following periodic table are colored.Which one is an alkaline earth metal?        

Problem

Four of the boxes in the following periodic table The colored boxes are described as follow. Groups are columns and periods are rows. An accessible periodic table can be found here: https://media.pearsoncmg.com/bc/bc_0media_chem/periodictable/table.html. The red box is located in Group 2A and period 3. The green box is located in group 8B and period 5. The blue box is located in group 6A and period 3. The yellow box is located in group 8A and period 1.are colored.

Which one is an alkaline earth metal?        

Solution

We have to determine which one of the four elements marked in the given periodic table is an alkaline earth metal.


Based on the electronic configuration of elements, the periodic table is divided into four blocks: s-, p-, d- and f-block.

The groups and blocks of periodic table are shown here:

 

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