Lithium and Selenide Compounds

The video tutorial explains how to write the chemical formula for lithium selenide, Li2Se. It begins by identifying the symbols for lithium (Li) and selenide (Se) and discusses the ionic charges of lithium (1+) and selenium (2-). The tutorial demonstrates how to balance these charges to form the compound Li2Se. It also covers how to name the compound from its formula, emphasizing the change from selenium to selenide. The video concludes with a brief closing statement.

What is the chemical symbol for lithium?

• Lt

• L

• Lm

• Li

Which element does 'Se' represent in the periodic table?

• Silicon

• Scandium

• Selenium

• Sulfur

What is the ionic charge of a lithium ion?

• 1+

• 2+

• 1-

• 2-

How many lithium ions are needed to balance one selenide ion?

• One

• Two

• Four

• Three

What is the chemical formula for lithium selenide?

• LiSe2

• Li2Se

• LiSe

• Li2S

When given the formula Li2Se, what is the correct name for the compound?

• Lithium Silicate

• Lithium Selenide

• Lithium Selenium

• Lithium Sulfide