Radium Electron Configuration Concepts

This video tutorial explains how to write the electron configuration for radium (Ra). It begins by identifying the number of electrons in radium using the periodic table. The tutorial then demonstrates the use of the diagonal rule to distribute electrons across different orbitals, ensuring the configuration ends in 7s2. The video also covers the condensed notation using Xenon (Xe) and explains how radium forms ions by losing two valence electrons, resulting in Ra2+. The tutorial is presented by Dr. B, who provides a clear and structured approach to understanding electron configurations.

What is the atomic number of radium, and how does it relate to the number of electrons in a neutral atom?

• 92, which equals the number of electrons

• 90, which equals the number of electrons

• 86, which equals the number of electrons

• 88, which equals the number of electrons

Where is radium located on the periodic table, and what is its electron configuration ending?

• In the 4th period, ending in 4s2

• In the 5th period, ending in 5s2

• In the 7th period, ending in 7s2

• In the 6th period, ending in 6s2

What is the purpose of the diagonal rule in electron configuration?

• To determine the order of filling electron orbitals

• To find the atomic number of an element

• To identify the period of an element

• To calculate the number of protons in an atom

Which noble gas is used in the condensed notation for radium's electron configuration?

• Xenon

• Krypton

• Argon

• Neon

What happens to radium's electrons when it forms an ion?

• It loses one electron

• It loses two electrons

• It gains one electron

• It gains two electrons