Question

give a brief note in s,p,d block elements​

Answer 1

Answer:

The s-block on the periodic table contains all of the elements in column 1 and 2 of the periodic table, plus helium, which is the topmost element in column 8A (or sometimes column 18). S-block elements are the elements with valence electrons in the s orbital. Elements in column 1 have one valence electron.

Answer 2

HEY bro here is ur ans......

S - BLOCK=> The elements in which the last electron enters the S orbital of their outermost energy level are called as block elements . It consists of element of group 1 and 2 having the ground state electronic configuration of outermost shell as ns1 and ns2 respectively. where and stands for outermost energy cell the elements corresponding to ns1 configuration are called the alkali metals while those corresponding to ns2 configuration are called alkaline earth metals has the general electronic configuration of S block elements may be expressed as ns^1-2.

P -BLOCK=> The elements in which the last electron enters the P orbital of the outermost energy level are called p block elements .The elements of group 13 to 18 involving addition of one (ns^1np^1) ,two (ns^2np^2),three (ns^2np^3),four (ns^2np^4),five(ns^2np^5),six(ns^2np^6)electrons respectively in p orbitals and S orbitals are already filled in their atoms constitute P block the general electronic configuration for the atoms of this block may be written as ns^2np^1-6.

D - BLOCK => The elements in which the last electron enters the d orbital of their last but one called penultimate energy level constitute D Block Elements this block consists of the elements line between s and p block starting from fourth period and onwards them constitut group 3 to 12 in the periodic table in this element the outermost shell contains one or two electrons in their S orbitals and as but the last electron enters the last but one D subshell that is (n-1)d the general electronic configuration of the atoms of D block may be written as (n-1)d^1-10 ns^0-2.

F - BLOCK=> the elements in which the last electron enters the f orbitals of the atoms are called F block elements in this element the last electron is added to the third to the outermost called anti penultimate energy level and -2 if this consists of two series of elements placed at the bottom of the periodic table first them first series follows lanthanum Z is equal to 57 and the elements present in this series are called lanthanoids and the lanthanides these are also called rare Earth elements 2nd series follows actinium a c z is equal to 89 and the elements present in this series are called actinoids and the actor needs this hour of radioactive nature the general electronic configuration of F block elements may be written as (n-2)f^1-14(n-1)d^0-2 ns^2.

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