Answer
Verified
384.3k+ views
Hint: For the isoelectronic species, the radii of the atom depends upon their atomic number that is their atomic radii is inversely proportional to their atomic number.
Complete step by step answer:
As we move across a period, the size of the atom decreases while moving down the group, the size of the atom increases. But for the isoelectronic species (i.e. the atoms having the same electronic configuration and number of electrons), the size of the atom is inversely proportional to its atomic number. As per the question, the following are the elements:
So, for the isoelectronic species, the atom having least effective nuclear charge that is lesser number of protons will exert less force on the valence electron and hence will possess larger atomic radii, while the atom having maximum effective nuclear charge that is a greater number of protons will ultimately have least atomic radii.
And here, as we can see that, Sulphur (S) has the least atomic number that means it will have the least number of protons and hence the largest radii. On the other hand, Calcium (Ca) having maximum number of protons will have the smallest size. So, Sulphur will be followed by Chlorine then Potassium and at last by Calcium i.e.
${{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}$
So, the correct answer is “Option C”.
Note: You may get confused with option A considering that atoms having greater number of protons will have larger atomic radii. But it should be kept in mind that, the atom having lesser number of protons will exert less effective nuclear charge thus possessing larger atomic radii.
Complete step by step answer:
As we move across a period, the size of the atom decreases while moving down the group, the size of the atom increases. But for the isoelectronic species (i.e. the atoms having the same electronic configuration and number of electrons), the size of the atom is inversely proportional to its atomic number. As per the question, the following are the elements:
So, for the isoelectronic species, the atom having least effective nuclear charge that is lesser number of protons will exert less force on the valence electron and hence will possess larger atomic radii, while the atom having maximum effective nuclear charge that is a greater number of protons will ultimately have least atomic radii.
And here, as we can see that, Sulphur (S) has the least atomic number that means it will have the least number of protons and hence the largest radii. On the other hand, Calcium (Ca) having maximum number of protons will have the smallest size. So, Sulphur will be followed by Chlorine then Potassium and at last by Calcium i.e.
${{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}$
So, the correct answer is “Option C”.
Note: You may get confused with option A considering that atoms having greater number of protons will have larger atomic radii. But it should be kept in mind that, the atom having lesser number of protons will exert less effective nuclear charge thus possessing larger atomic radii.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
How do you solve x2 11x + 28 0 using the quadratic class 10 maths CBSE
Select the correct plural noun from the given singular class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
The sum of three consecutive multiples of 11 is 363 class 7 maths CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
How many squares are there in a chess board A 1296 class 11 maths CBSE