For which element the first ionization enthalpy (KJ mol-1) is 419?
Caesium.
Sodium
Potassium
Rubidium
Lithium nitrate on heating decomposes to give _____________
Li2O.
NO2
O2.
All the above.
What is the atomic radius of Li?
186
152
227
375
The distortion of the electron cloud of an anion by a cation is called _________________.
Photoelectric effect.
Photoelectrons.
Polarisation.
None of the above.
For which element the second ionization enthalpy (KJ mol-1) is 2230?
Caesium
For which element the boiling point is 961.0?
Lithium
What is the atomic radius of K?
LiF is insoluble in water due to its _________________.
Low lattice energy.
Very low lattice energy.
High lattice energy.
Very high lattice energy.
Lithium hydroxide is a __________ while the hydroxides of other alkali metals are _____________.
Weak base, Strong base.
Strong base, Weak base
Very weak base,Strong base.
Weak base,very strong base.
Which one the following elements are present in group 1 or 1 A?
Rubedium
Francium
