What Are P Block Elements?

P block elements are defined as those with which have their valence electrons in their outer most p orbitals.

They are the elements on the right hand side of the periodic table, to the top of the table.  They are the elements boron, carbon, nitrogen, oxygen, fluorine neon, aluminium, silicon, phosphorus, and sulphur to name a few. chlorine, argon, gallium, germanium arsenic, selenium, bromine, krypton, indium, tin, antimony, tellurium, iodine xenon,thallium, lead, bismuth, polonium, astanine, and radon.

Note that this list includes the inert or rare gases, and that as you move down from the first row to the fifth row, the elements become more metallic in their properties, while those in the early rows are mainly non-metallic elements. The few first rows are mainly electronegative elements, which form covalent bonds. But in the bottom rows, they are more electropositive and form ionic compounds.  EG lead and bismuth are metals, but boron and carbon are non-metals