Barium Selenide and Ionic Compounds

The video tutorial explains how to write the formula for barium selenide, an ionic compound. It begins by identifying the element symbols for barium (Ba) and selenium (Se), and discusses their ionic nature. Barium, being a metal, has a 2+ charge, while selenium, a non-metal, has a 2- charge. These charges balance each other, resulting in a net charge of zero, forming the compound BaSe. The tutorial also covers how to name the compound, changing 'selenium' to 'selenide' to form 'barium selenide'.

What is the element symbol for barium?

• Ba

• Br

• Be

• B

Why is barium selenide considered an ionic compound?

• Because it is formed by a metal and a metalloid

• Because it is formed by two metals

• Because it is formed by a metal and a non-metal

• Because it is formed by two non-metals

What is the charge of barium in barium selenide?

• 1+

• 2+

• 1-

• 2-

How do the charges of barium and selenium balance out in barium selenide?

• Barium 1+ and Selenium 1-

• Barium 2+ and Selenium 2-

• Barium 3+ and Selenium 3-

• Barium 2+ and Selenium 1-

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

• Barium Selenate

• Barium Selenite

• Barium Selenide

• Barium Selenium