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The p-Block Elements

P-Block elements are those found in groups 13 through 18 of the periodic table. Their electronic valence shell configuration is ns2np1-6. We will cover the remaining groups of p-Block elements since we already covered group 13 and group 14 in the previous class.

Group 15 Elements:

The elements in group 15 have an electronic configuration of ns2np3. This group contains the elements nitrogen, phosphorus, arsenic, antimony, and bismuth. The fact that nitrogen is smaller than the other elements in this group, forms numerous p-p bonds with itself, and has atoms that are highly electronegative set it apart from the others. Elements in this group exhibit a number of characteristics, including

  • Two significant oxidation states, +5 and +3, are present.

  • Halogen, oxygen, and hydrogen cause them to react.

Watch The Following Video For More Information On P-Block Elements

Group 16 Elements:

The maximum oxidation state of the elements in group 16 is +6, and their electronic configuration is ns2np4. Its chemical and physical characteristics vary. By heating KClO3 in the presence of MnO2, dioxygen is created in a laboratory setting.

Group 17 Elements:

Group 17 elements are extremely reactive and only exist in the combined state. These substances include fluorine, chlorine, bromine, iodine, and astatine. While their typical oxidation state is -1, their highest oxidation state is +7.

Group 18 Elements:

Noble gases make up group 18 elements. With the exception of Helium, their valance shell electronic configuration is ns2np6. He has a 1s2 electronic configuration.

Few mcq's Questions:

Question :

Chlorine acts as a bleaching agent only in presence of

a) Sunlight

(b) Moisture

(c) Dry air

(d) Pure oxygen

Answer: B


The laughing gas is:

(a) NO

(b) N2O

(c) N04

(d) N2O5

Answer: B


The correct decreasing order of basic strength is:

(a) AsH3 > SbH3 > PH3 > NH3

(b) SbH AsH3 > PH3> NH3

(c) NH> PHs > AsHs > SbH

(d) PH3 AsH3 > SbH3> NH3

Answer: C


lodide of Millon's base is

(a) HIO3

(b) KaHgl4

(C) NH2HgO.Hgl

(d) Hg(NH2 )

Answer: C

Question :

The mixture of concentrated HCl and HNO3 made in 3:1 ratio contains

(a) Clo2

(b) NOCI

(c) NCl3

(d) N2O4

Answer: B

For more information on P block elements check videos below:

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