Main distinction – S vs p Block Elements

The periodic table of elements contains all facets that have been found so far. These aspects are grouped into 4 significant groups together s block, p block, d block and also f block. They space categorized according to the orbital wherein their valence electrons are present. Furthermore, these facets can likewise be categorized as metals, nonmetals, and also metalloids according to your physical properties. Every s block aspects except hydrogen space metals. Most p block elements are nonmetals. Remainder of the aspects in the p block room metalloids. The key difference in between s and also p block elements is that the valence electron of the s block aspects are in the s orbit whereas the valence electrons of the ns block aspects are in the p orbital.

Key areas Covered

1. What room S Block Elements – Definition, characteristic Properties, Members 2. What are P Block Elements – Definition, characteristics Properties, Members 3. What is the Difference between S and also P Block Elements – comparison of key Differences

Key Terms: Metals, Metalloids, Non-Metals, ns Block Elements, S Block Elements, Valence Electrons


What space S Block Elements

S block elements are the elements that have their valence electrons in their outermost s orbital. Due to the fact that s orbital can keep a preferably of only 2 electrons, every s block aspects are written of either 1 or 2 electrons in their outermost s orbital. Your electron configuration always ends through s orbital (ns).

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Figure 1: blocks in regular Table of elements (s block is in pink color)

Except for hydrogen, all various other members the s block room metals. Hydrogen is a nonmetal. But since it has only one s orbital, that is also categorized as an s block element. The teams 1 and also 2 incorporate s block elements. Aspects in group1A space composed that one valence electron in the outermost s orbit whereas group 2 facets are created of two valence electrons. Group 1 aspects are named as alkali metals, and also group 2 aspects are alkali earth metals.

Helium is also an s block element since it has only one s orbital that is created of 2 electrons. Therefore, Helium additionally has that is valence electrons in s orbital and also is categorized as an s block element. Helium is also a non-metal.

The oxidation claims of s block aspects can be one of two people +1 or +2 (hydrogen sometimes have -1 oxidation state). This is since these facets can become stable by remove one electron (in group 1 elements) or two electrons (in group 2 elements).

The atomic radius of s block elements increases down the group because of the addition of a new electron shell after every period. The ionization energy decreases down the group since the atom radius increases. This is since electrons in the outermost orbital are weakly attractive by the nucleus

Both melting point and boiling suggest decrease under the group as well. This is since the strength of the metallic shortcut decreases v the rise of atomic radius. Thus, metal atoms can conveniently be separated.

What space P Block Elements

P block aspects are elements having their valence electrons in your outermost ns orbital. Ns subshell deserve to hold approximately 6 electrons. Therefore, the variety of electrons in the outermost p orbital of ns block facets can be 1, 2, 3, 4, 5, or 6. Their electron configuration always ends v p orbital (np).

Most p block facets are nonmetals whereas couple of others space metalloids. From team 3 to group 8 has p block facets except because that Helium (Helium belongs come the s block as defined above). The atomic radius of p block facets increase down a group and decrease along a period. The ionization energy decreases down the group and increases follow me the period. Electronegativity is also increased follow me the period. The many electronegative aspect is Fluorine which belongs to the ns block.


Figure 2: Metalloids that the p Block

Most ns block facets show allotropy. Allotropy advert to different forms that molecular frameworks of the exact same element. The oxidation says of ns block elements may vary relying on the number of valence electrons existing in their atoms. Some elements may have only one oxidation state vice versa, other elements have number of oxidation states.

group 8 of the ns block is written of noble gases. These aspects are inert gases and also cannot experience chemical reactions uneven in too much conditions. Noble gases have the many stable electron configuration and also their ns orbitals are totally filled with electrons. Team 7 facets are referred to as halogens. Nearly all facets in the p block type covalent compounds and can additionally take component in ionic bonds.

Difference between S and also P Block Elements


S Block Elements: S block facets are aspects having your valence electrons in your outermost s orbital.

P Block Elements: p block facets are facets having their valence electrons in your outermost p orbital.

Oxidation States

S Block Elements: S block elements can have actually 0, +1 or +2 oxidation states.

P Block Elements: ns block facets show a variety of oxidation states varying from -3, 0 to +5 (stable oxidation states).

Chemical Bonding

S Block Elements: S block elements form metallic bonds and also ionic bonds.

P Block Elements: p block elements type covalent bonds or ionic binding (with metals).

Metal Properties

S Block Elements: all s block elements are metals.

P Block Elements: many of the p block facets are nonmetals, others room metalloids.


S Block Elements: The electronegativity that s block aspects is comparatively less.

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P Block Elements: The electronegativity of ns block aspects is comparatively high.


S and also p block elements are chemical facets found in the periodic table that elements. They room grouped as s block or p block according to the place of valence electron in orbitals. The main difference in between s and p block facets is that the valence electron of the s block aspects are in the s orbital whereas the valence electron of the p block aspects are in the p orbital. 


1.”S-Block aspects on the regular Table: properties & Overview.” N.d. Web. Easily accessible here. 02 Aug. 2017.  2.”P-block Elements.” P-block facets Properties, P-block Elements meaning | N.p., n.d. Web. Available here. 02 Aug. 2017. 

Image Courtesy:

1. “Periodic Table structure” by Sch0013r – File:PTable structure.png (CC BY-SA 3.0) via Commons Wikimedia  2. “Periodic table (metalloids)” through DePiep – Own job-related (CC BY-SA 4.0) via Commons Wikimedia