Value of heat of fusion of NaCI is
Very low
Very high
Not very low and not very high
None of the above
The value of heat of fusion of NaCI is very high due to fcc arrangement of its ions
On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases. Potassium forms K+ ion but it does not form K2+ because of;