Answer
Verified
396k+ views
Hint: The coordination number can understand from the ratio of the atoms in a molecule. The number of ions surrounding an oppositely charged ion is a lattice of the crystal is called the coordination number. The larger the coordination number the more is the density of the substance. Larger ions have larger coordination numbers.
Complete step by step answer:
The coordination number of a molecule is referred to as the number of ions of the other charge surrounding the ion of the opposite charge. In the case of sodium chloride we have sodium ions placed and there are 6 chloride ions surrounding each of the sodium ions. In the case of NaCl the ratio is 1:1 and as a result there are 6 sodium ions surrounding the chloride ion and vice versa.
In case of the periodic table we are well aware that as we move down the group then the size of the cation increases and as a result of the increase in the number of the shell as we move down. Thus we find that the size of the ion increases and hence caesium has a very large size compared to that of sodium. Hence there is a change in structure: the cesium ions do not form a lattice similar to that of sodium but rather we find that it occupies the centre of the cube that there are 8 chloride ions surrounding it. Also as the ratio of CsCl is also as that of sodium hence we find that the coordination number remains as 8 in this case.
Hence the answer to this question is that the coordination number of cesium in cesium chloride is 8.
Thus the option is A.
Note:
The radius ratio rule is predicted by the coordination number. It gives a clear picture of how a lattice is present. It is used to calculate the density of the substance. The larger is the ion the larger is the coordination number.
Complete step by step answer:
The coordination number of a molecule is referred to as the number of ions of the other charge surrounding the ion of the opposite charge. In the case of sodium chloride we have sodium ions placed and there are 6 chloride ions surrounding each of the sodium ions. In the case of NaCl the ratio is 1:1 and as a result there are 6 sodium ions surrounding the chloride ion and vice versa.
In case of the periodic table we are well aware that as we move down the group then the size of the cation increases and as a result of the increase in the number of the shell as we move down. Thus we find that the size of the ion increases and hence caesium has a very large size compared to that of sodium. Hence there is a change in structure: the cesium ions do not form a lattice similar to that of sodium but rather we find that it occupies the centre of the cube that there are 8 chloride ions surrounding it. Also as the ratio of CsCl is also as that of sodium hence we find that the coordination number remains as 8 in this case.
Hence the answer to this question is that the coordination number of cesium in cesium chloride is 8.
Thus the option is A.
Note:
The radius ratio rule is predicted by the coordination number. It gives a clear picture of how a lattice is present. It is used to calculate the density of the substance. The larger is the ion the larger is the coordination number.
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
Assertion CNG is a better fuel than petrol Reason It class 11 chemistry CBSE
How does pressure exerted by solid and a fluid differ class 8 physics CBSE
Number of valence electrons in Chlorine ion are a 16 class 11 chemistry CBSE
What are agricultural practices? Define
What does CNG stand for and why is it considered to class 10 chemistry CBSE
The rate of evaporation depends on a Surface area b class 9 chemistry CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
State whether the following statement is true or false class 11 physics CBSE
A night bird owl can see very well in the night but class 12 physics CBSE