The structure of the periodic table is based on the order in which electron subs
ID: 1495514 • Letter: T
Question
The structure of the periodic table is based on the order in which electron subshells are filled with increasing atomic number Z. You know that the first two electrons go into the 1s subshell and correspond to hydrogen and helium (red in the top row). The next two electrons go into the 2s subshell. The elements with Z=3 and Z=4 are lithium and beryllium, respectively (red, second row). The periodic table shown in the figure has each element colored based on the subshell in which the highest-energy electron is found. Which of the following correctly pairs the colors with the subshells that they indicate?
A. red=p yellow=s blue=d B. red=s yellow=p blue=d C. red=d yellow=p blue=s D. red=s yellow=d blue=p E. red=p yellow=d blue=s He Li Be NaMgExplanation / Answer
the physical and chemical properties of elements are periodic functions of their atomic numbers
the physical and chemical properties of elements are periodic functions of their electronic configurations.
if elements are arranged in the increasing order of their atomic numbers ,
IN THIS PERIODIC TABLE RED COLOUR REPRESENTS S--- BLOCK
because s - orbital can have a maximum of two electrons in it . therefore s--block has two groups in it they are
group 1 and group 2
their electronic configuration of s -- block elements is ns1 or ns2
ex: H,LI.Na,K,Rb,Cs,Fr,Be,Mg,Ca,Sr,Ba,Ra are the s- block elements except He because it is nobal gases
IN THIS PERIODIC TABLE THE BLUE REPRESENT P-- BLOCK
because it has six groups as the three p orbitals to gether can accomadate a maximum of six elements
the groups are group 3[boron family] group 4 [carbon family]group 5[nitrogen family] group 6[oxygen family]
group 7[halogens family] and group O [noble gases]
the electronic configuration of p-block elements varies from ns2 np1 to ns2 np6
IN THE PERODIC TABLE YELLOW COLOUR REPRESENT D--BLOCK
because the d-block has ten groups as the five d-orbitals
the electronic configuration of d- block elements varies from [n-1]d^1-10 ns^1-2
the groups are
3d series ; from scandium(z=21) to zinc (z=30) in fourth period
4d series ; from yttrium (z=39) to cadmium (z=48) in the fifth period
5d series ; from lanthanum (z=57) the differentiating electrons complete 4f orbitals and then enter 5d orbitals from hafnium(z=72) to mercury (z=80) to from the third series in the sixth period
6d series : there is incomplete 6d series from actinium (z=89) in the seventh period
so the correct option is D
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