Which of the following orders regarding ionisation energy is correct?
N > O > F
N < O < F
N > O < F
N < O < F
The electronic configuration 1s2, 2s22p6, 3s23p63d9 represents a
metal atom
non metal atom
non-metallic anion
metallic cation
In a given shell the order of screening effect is
s > p > d > f
s > p > f > d
f > d > p > s
s < p < d < f
The ionisation energy of hydrogen atom is 13.6eV. What will be the ionisation energy of He+?
13.6 eV
54.4 eV
122.4 eV
Zero
B.
54.4 eV
Ionisation energy of He+ = 13.6 x Z2 eV
= 13.6 x (2)2 eV
= 13.6 x 4 eV = 54.4 eV