Each period of the periodic table begins with an element from which family?

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The periodic table has 18 vertical columns known as groups and 7 horizontal rows known as periods. The elements are arranged in the increasing order of atomic numbers. 

The elements in each period have the same number of atomic orbitals, whereas the elements in each group have the same number of valence electrons. 

There are also other group of elements all over the table. These groups are called as families, the elements in these families are grouped based on their chemical properties.

Now let’s see the first element of each period.

The first element of each period...

(The entire section contains 2 answers and 287 words.)

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