Base on the 2 video ,we can summarize that element can be discriminate from the table by knowing their properties.The preperties that we can derive from certeain element in the periodic table is number of proton,atomic mass, and atomic configuration.From the table ,the horizontal row denote the periods for each element while the vertical row denote the group of the element.The group of certain element are determined by the electron valens in the atom.Electron valens is the number of electron filled in the outermost shell.Electron valens determine the chemical reaction of the elemnt and their properties.Elements can be grouped into metals and nonmetals, but traditionally there are three element groups: metals, nonmetals and metalloids. As the name "metalloids" suggests, these elements have both metal-like and non-metal-like properties.There are also three basic types of metals: alkali metals, alkaline earth metals and transitional metals. The transitional metals include a number of subcategories of their own.The elements classified strictly as nonmetals are surprisingly few in number, with only seven of them (H, C, N, O, P, S and Se) dotting the periodic table. This classification, however, excludes nonmetals that have earned their own categories, including the five halogens (F, Cl, Br, I and At ) and the six noble gases (He, Ne, Ar, Kr, Xe and Ra).
A block of the periodic table is a set of elements unified by the orbitals their valence electrons or vacancies lie in. The term appears to have been first used by Charles Janet. Each blockl is named after its characteristic orbital: s-block, p-block, d-block, and f-block.In the video had been stated the location of each block and the properties of s-block and p-block.
 d-block elements are transition metals of element groups 3-12. D-Block elements:
~Have valence electrons in their two outermost and shells.
~d-block elements behave in a manner that is somewhere between that of highly reactive electropositive alkali metals and the covalent compound forming elements (which is why they are called "transition elements").
~Have high melting and boiling points.
~Typically form colored salts.
~Are generally good catalysts.
f-block: Inner transition elements, usually the lanthanide and actinide series, including lanthanum and actinium. These elements are metals which have:
~High melting points.
~Variable oxidations states.
~The ability to form colored salts

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