Explain why :
The second ionisation energy of Li is very high.

The second ionisation potential is

First ionisation energy of alkali metals is very low but second ionisation energy is very high because

Assertion: Magnesium does not impart characteristic colour to the bunsen-burner flame. Reason: Ionisation energy of Mg is very high.

The energy needed for Li_(g) rarr Li_(g)^(3+) + 3e is 1. 96 xx 10^4 kJ mol ^(-1) . If the first ionisation energy of Li is 520 k J mol^(-1) . Calcuate the second ionisation energy of Li . (Given : IE_1 for H = 2 . 2. 18 xx 10^(-18) k J "atom"^(-1) ).

With the help of Bohr 's model , calculate the second ionisation energy of helium (energy required to remove the electron from He^(o+)

Why is the second ionisation energy of an element much greater than its first ionisation energy ?

Second ionisation potential of Li,Be,B is in the order:

Assertion: The second ionisation energies of V, Cr and Mn are in the order VltCrltMn . Reason: Ionisation energies show a regular increase along a period with increase of atomic number.

The ionisation energy of Li^(2+) atom in ground state is,

Why are the second ionisation energies of alkaline earth metals much smaller than those of alkali metals ?