What are the 3 main elements of the periodic table?

Answer 1

There is metals, nonmetals and metaloids.

Specifically there is 8 different categories Alkali metals, Alkali Earth metal, Transition metals, Other metals, Other nonmetal's Halogens, Noble Gases and Rare Earth metals.

If you want to be really basic there is solids, liquids and gases.

Answer 2

From the phrasing of your question it seems like you want to know either the three most common elements or the four organic basic elements.

The most common elements (in order):

In the universe - Hydrogen, Helium (star material), and Oxygen

In the earth - Oxygen, Magnesium, and Silicon (rock material)

In the ocean - Oxygen, Hydrogen, and Chlorine

In the human body - Oxygen, Carbon, and Hydrogen

The four organic basic elements are Hydrogen, Nitrogen, Oxygen and Carbon.

Answer 3

The three types of elements found in the Periodic Table are the metals, which tend to donate electrons, the nonmetals, which tend to acquire electrons, and the noble gases which tend to remain as they are.