Question

what all are the necessary elements in periodic table which is used frequently​

Answer 1

Explanation:

valency

atomic size

metallic and non metallic nature

no. of orbits(K,L,M,N)

electro positivity

electro negativity

basic oxides and acidic oxides

Answer 2

Answer:

Note that most living matter consists primarily of the so-called bulk elements: oxygen, carbon, hydrogen, nitrogen, and sulfur—the building blocks of the compounds that constitute our organs and muscles. These five elements also constitute the bulk of our diet; tens of grams per day are required for humans.