The atomic radii of `Cs^+` and `Cl^-` are `1.69 oversetcircA` and `1.81 oversetcircA` respectively. Predict the coordination number of `Cs^+` ion and structure of CsCl?

The ionic radii of A^(+) and B^(-) are 1.7 Å and 1.8 Å respectively . Find the co-ordination number of A^(+)

The radius of Na^+ ion is 95 pm and that of Cl^- ion is 181 pm. Predict whether the coordination number of Na^+ ion is 6 or 4.

True or false The two ions A^+ and B^- have radii 90 and 200 pm respectively. In close paked crystal of a compound AB, the coordination number of A^+ is 4.

The questions given below consist of an assertion and the reason. Use the following key to choose the appropriate answer. (a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. (b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.(c) Assertion is is CORRECT but reason is INCORRECT. (d) If assertion is INCORRECT but reason is CORRECT. (e)If both assertion and reason are INCORRECT. Assertion: In CsCl structure, the coordination number of Cs^+ ion is 8. Reason: Cl^- ions in CsCl have body centred cubic arrangement.

Lithium borohydride (LiBH_4) crystallizes in an orthorhombic system having 4 molecules per unit cell. The unit dimesions are: a=6.81 oversetcircA , b=4.43 oversetcircA and c=7.17 oversetcircA . Cacluate the density of the crystal (At. Mass of Li=7, B=11, H=1u).

If the radius of Na^(+) ion is 95 p m and that of Cl^(-) ion is 181 p m , then the coordination number if of Na+

Salt AB has a zinc blende structure. The radius of A^(2+) and B^(2-) ion are 0.7Å and 1.8 Å respectively. The edge length of AB unit cell is:

Three photo diodes D_1 , D_2 and D_3 are made of semiconductors having band gaps of 2.5 eV, 2eV and 3eV, respectively. Which ones will be able to detect light of wavelength 6000 oversetcircA ?

Compare the radii nuclei with mass number 1 and 27 respectively.