Question

Write the complete (long form) electron configuration AND include how many valence electrons there are for each of the following:

a) Ga

b) Ir

Thanks!

Answer 1

Answer:

Ga - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

Ir - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²5d⁷

General Formulas and Concepts:

Chemistry - Atomic Structure

• Reading a Periodic Table
• Electron Configurations
• Electron Assignments
• Electron Sublevels on a Periodic Table

Explanation:

Step 1: Define

Ga - Element 31

Ir - Element 77

Step 2: Identify

Ga has 31 protons and 31 electrons. It is in Period 4 and in Group 13.

Ir has 77 protons and 77 electrons. It is in Period 6 and in Group 9.

Step 3: Electron Configurations

Ga - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

Ir - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²5d⁷