Potassium and Selenide Compounds

The video tutorial explains how to write the chemical formula for potassium selenide. It begins by identifying the symbols for potassium (K) and selenium (Se) from the periodic table. The tutorial then discusses the nature of ionic compounds, focusing on the charges of potassium (1+) and selenide (2-). To balance the charges, two potassium ions are needed for each selenide ion, resulting in the formula K2Se. The video concludes by explaining how to name the compound as potassium selenide.

What is the chemical symbol for potassium?

• P

• K

• Pt

• Po

Which element does the symbol 'Se' represent?

• Silicon

• Selenium

• Sulfur

• Scandium

What is the charge of a potassium ion?

• 2+

• 1-

• 2-

• 1+

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

• One

• Three

• Two

• Four

What is the correct name for the compound with the formula K2Se?

• Potassium Selenate

• Potassium Sulfide

• Potassium Silicate

• Potassium Selenide