Question

Which of the following is/are generally true regarding effective nuclear charge (Zeff) :

• A. It increases on moving left to right in a period.
• B. It remains almost constant on moving top to bottom in a group.
• C. For isoelectronic species, as Z increases, Zeff decreases.
• D. Both (1) and (2).

Answer 1

Answer: (D)

Both (1) and (2).

Answer 2

For isoelectronic species, as Z increases, Zeff increases (and vice versa).