The ionic radii of `F^Theta` and `Na^o+` are 133 and 98 pm, respectively.

The atomic radii of Cl, I and Br are 99, 133 and 114 pm, respectively.

The atomic radii of Na, K and Mg are 186, 227 and 160 pm, respectively. Explain the differences.

In A^(+)B^(-) ions compound, radii of A^(+) and B^(-) ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be

Determine the density of cesium chloride which crystallizes in a bcc type structure with the edge length 412.1 pm. The atomic masses of Cs and CI are 133 and 35.5 respectively.

When 2mole of C_(2)H_(6) are completely burnt -3129kJ of heat is liberated. Calculate the heat of formation of C_(2)H_(6).Delta_(f)H^(Theta) for CO_(2) and H_(2)O are -395 and -286kJ , respectively.

The ionic radii of A^(+) and B^(-) ions are 0.98 xx 10^(-10) m and 1.81 xx 10^(-10) m . The coordination number of each ion in AB is

Calculate molar conductivities at zero concentration for CaCl_2 , and Na_2SO_4 . Given : molar ionic conductivities of Ca^(2o+), Cl^(Theta), Na^(o+) and SO_4^(o+) ions are respectively, 104, 76.4, 50.1 and 159.6 ohm^(-1) cm^2 mol^(-1) .

What is the molar conductivity of Agl at zero concentration if the ^^_o values of Nal, AgNO3 and NaNO_3 are respectively 126.9Omega^(-1) cm^2mol^(-1) 133.4 Omega^(-1) cm^2mol^(-1) and 121.5 Omega^(-1) cm^2 mol^(-1) ?

Which of the following has more electrons than neutrons? (Mass number of Al, C, O and F is 27, 12, 16 and 19 respectively)