Question

Answer the following
Write general electronic configuration for s, p, d and f block elements.
Define ionization enthalpy. How does it vary along the period and down the group?
Answer the following
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Answer 1

Answer:

The general outer electronic configuration of s block elements is ns(1−2). ... The general outer electronic configuration of d block elements is (n−1)d(1−10)ns(0−2). The general outer electronic configuration of f− block elements is (n−2)f(0−14)(n−1)d(0−1)ns2.

The amount of energy required to remove an electron from an isolated gaseous atom in the ground state is called ionization enthalpy. Ionization enthalpy increases along the period. ... Ionization enthalpy decreases down the group.