Question

1. Arrange the following elements according to the increasing ionization energy and decreasing electron affinity.
1. Zn, Mn, Si, Fe 3. U, Es, Bk, Cf 5. La, Ac, Sr, K
2. Al, Cu, Bi, Ti 4. Lr, No, Ca, Rf

Answer 1

INCREASING ORDER OF IONISATION ENERGY AND DECREASING ORDER OF ELECTRON AFFINITY:

Explanation:

• If we move in the periodic table From left to right ionisation energy and electron affinity will be increase and if we move in the periodic table from up to down ionisation energy and electron affinity will be decreased. this is the correct order for the given question:

1. Si < Mn< Fe < Zn

2. Al < Ti < Cu < Bi

3. U<Bk < Cf < Es

4. Ca < Rf <No <Lr

5. K<Sr< La < Ac