d and f BLOCK ELEMENTS

Why are the electronic configurations of some transition elements, like Chromium and Copper, exceptions to the general rule?

• Because the d-orbitals fill before the s-orbitals
• Due to the greater stability associated with half-filled or completely filled d-subshells
• Because the s-orbitals are always filled first
• Because the atomic number is even

What is the general electronic configuration of the outer orbitals for the majority of transition elements, excluding specific exceptions?

• (n-1)d⁰ns¹⁻²
• (n-1)d¹⁻¹⁰ns¹⁻²
• (n-1)d¹⁰ns⁰⁻¹
• ns¹⁻²np¹⁻⁶

How many electrons are present in the 4s orbital of Zinc (Zn) in its ground state?

• 1
• 2
• 10
• 0

How many electrons are present in the 4s orbital of Copper (Cu) in its ground state?

• 2
• 1
• 10
• 0

How many electrons are present in the 4s orbital of Nickel (Ni) in its ground state?

• 1
• 2
• 8
• 0