Answer : The periodic table’s lower and middle regions often contain the elements that make up the human body, particularly those from the second period (carbon, nitrogen, oxygen, and fluorine) to the sixth period (lead and bismuth). Carbon, hydrogen, nitrogen, oxygen, calcium, iron, sodium, chlorine, and potassium are only a few of these elements.
Although there are some metals and metalloids, the majority of the elements in the human body are nonmetals. The “main group” or “representative elements” are those elements in this section of the periodic table that have valence electrons in the s and p orbitals.
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