Electronic Configuration of Elements — Prelims Questions

Which of the following electronic configurations represents an element in the d-block of the periodic table?

An element has an atomic number of 29. What is its correct ground state electronic configuration?

How many unpaired electrons are present in a $Fe^{2+}$ ion (Atomic number of Fe = 26)?

Which of the following sets of quantum numbers is NOT possible for an electron in an atom?

Which of the following elements has an electronic configuration with 3 unpaired electrons?

The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^7 4s^2$. To which block and period does this element belong?

Which of the following statements about electronic configuration is INCORRECT?