Answer to Question #98286 in General Chemistry for Brittany Wallace

Question

1. Write the complete electron configuration for the nickel atom. Using NOBLE GAS notation write the electron configuration for the cobalt atom.
2. Write the complete electron configuration for the helium atom. Using NOBLE GAS notation write the electron configuration for the sodium atom.

Answer 1

Answer on Question #98286 – Chemistry – General Chemistry

Task:

1. Write the complete electron configuration for the nickel atom. Using NOBLE GAS notation write the electron configuration for the cobalt atom.

2. Write the complete electron configuration for the helium atom. Using NOBLE GAS notation write the electron configuration for the sodium atom.

Solution (1):

The complete electron configuration for the nickel atom: Ni = 1s²2s²2p⁶3s²3p⁶4s²3d⁸;

The electron configuration for the cobalt atom using noble gas notation: Co = [Ar]3d⁷4s².

Answer (1): Ni = 1s²2s²2p⁶3s²3p⁶4s²3d⁸; Co = [Ar]3d⁷4s².

Solution (2):

The complete electron configuration for the helium atom: He = 1s²;

The electron configuration for the sodium atom using noble gas notation: Na = [Ne]3s¹.

Answer (2): He = 1s²; Na = [Ne]3s¹.