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
The metal used to recover copper from a solution of CuSO4 is :
Fe
He
Na
Ag
A.
Fe
From a solution of CuSO4, Cu can be recovered by Fe metal. Because Fe is more reactive than Cu, it replace Cu easily.