Lesson 3 unit 2 chem

​Isoelectronic

By Alex Davila

​SWBAT: predict stable

ions and identify

isoelectronic species.

Match

Match the following

• All elements look to be...

Gained 3 electrons

Lost 2 electrons

Lost 1 electron

Gained 1 electron

Stable by having a full outer shell

• Gained 3 electrons

• Lost 2 electrons

• Lost 1 electron

• Gained 1 electron

• Stable by having a full outer shell

​How many valence electrons does oxygen have?


To be stable will it need to gain or lose electrons? Why?



Will it be a cation or anion?

OXYGEN

​Cations	​Lose Electrons	​Positive Charge	​Na->Na+
​Anions	​Gain electrons	​Negative Charge	​Cl-> Cl-

​Cations and Anions

Ions/atoms that have the same electron configuration.



EXAMPLE:
Ne, Na⁺ , O^-2 all have 10electrons--> They are isoelectronic with Ne.

Isoelectronic

​Electron Configuration

​Write the Full electron configuration of O^-2






Write the Full electron Configuration of Neon (Ne)





Oxygen is Isoelectronic with Ne

chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://apcentral.collegeboard.org/media/pdf/chemistry-periodic-table-2020.pdf

​A) Lithium
B)Flourine
C)Chlorine

​

Which element is Isoelectronic with Argon (Ar)?

Multiple Choice

What is the electron Configuration of Be⁺²

• 1s²

• 1s² 2s²

Multiple Choice

Sodium (Na) will become isoelectronic with which gas after Ionization?

• Ne

• Ar

• He

• O

Multiple Choice

What is the gas that is isoelectronic with K⁺

• He

• Ne

• Ar

• Xe