1. Find Nickel's Atomic Number:
Nickel (Ni) has an atomic number of 28. This means it has 28 protons and 28 electrons.
2. Identify the Preceding Noble Gas:
The noble gas that comes before nickel in the periodic table is Argon (Ar) with an atomic number of 18.
3. Determine the Remaining Electrons:
Nickel has 28 electrons, and Argon has 18 electrons. This means there are 10 more electrons in Nickel (28 - 18 = 10).
4. Write the Noble Gas Configuration:
The noble gas configuration for Nickel is: [Ar] 4s² 3d⁸
Explanation:
* [Ar] represents the electron configuration of Argon, which is the same as the first 18 electrons of Nickel.
* 4s² means there are two electrons in the 4s subshell.
* 3d⁸ means there are eight electrons in the 3d subshell.
