Questions: What is the abbreviated electron configuration for nickel (atomic number 28)? (A) (B) [Ar]asisdo (C) [Ar] 3d^8 (D) [Kr] 4523 d 8 (E) [Ar] 4524 p^4

Transcript text: What is the abbreviated electron configuration for nickel (atomic number 28)? (A) (B) [Ar]asisdo (C) $[$ Ar $] 3 \mathrm{~d}^8$ (D) $[\mathrm{Kr}] 4523 \mathrm{~d} 8$ (E) $[$ Ar $] 4524 \mathrm{p}^4$

Solution

Solution Steps

Step 1: Identify the Atomic Number and Element

Nickel has an atomic number of 28. This means it has 28 electrons.

Step 2: Determine the Abbreviated Electron Configuration

The electron configuration of an element can be abbreviated using the nearest noble gas preceding it in the periodic table. For nickel, the nearest noble gas is argon (Ar), which has an atomic number of 18.

Step 3: Write the Full Electron Configuration

The full electron configuration for nickel is: \[ 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^8 \]

Step 4: Abbreviate the Electron Configuration

Using the noble gas argon (Ar) to abbreviate, the electron configuration for nickel becomes: \[ [\text{Ar}] 4s^2 3d^8 \]

Step 5: Match with the Given Options

Compare the abbreviated electron configuration with the provided options: