Strontium Ion and Lewis Structures

This video tutorial explains how to write Lewis structures for Strontium (Sr) and its ion (Sr2+). It covers two methods: using the periodic table to determine valence electrons and using electron configuration. The video also demonstrates how to write the Lewis structure for the Sr2+ ion by removing valence electrons, resulting in a stable configuration. The tutorial concludes with a summary of the key points discussed.

What is the main focus of the video tutorial?

• Understanding chemical reactions

• Studying the periodic table trends

• Learning about atomic mass

• Writing Lewis structures for Strontium and its ion

How many valence electrons does Strontium have according to the periodic table?

• Four

• Two

• One

• Three

What is the significance of the S orbital in the Lewis structure of Strontium?

• It is irrelevant to the Lewis structure

• It holds two electrons and is full

• It is always empty

• It holds three electrons

What is the electron configuration method used for?

• Determining atomic mass

• Identifying the number of protons

• Writing the Lewis structure

• Calculating molecular weight

How many electrons are involved in bonding for Strontium?

• Four

• Three

• Two

• One

What happens to the valence electrons when forming the Strontium ion?

• They are doubled

• They are removed

• They are shared

• They are unchanged

What charge does the Strontium ion have after losing its valence electrons?

• 2+

• 1-

• 2-

• 1+

Why is the Strontium ion considered stable?

• It has gained electrons

• It has a full outer energy level

• It has lost protons

• It has an incomplete energy level

What is the conventional representation of the Strontium ion in Lewis structures?

• With a neutral charge

• With a negative sign

• With brackets and a charge

• With dots around the symbol

What is the final configuration of the Strontium ion?

• It has an incomplete energy level

• It has a full energy level underneath

• It has gained additional electrons

• It has an unstable configuration