Cobalt and Bromine Compounds

The video tutorial explains how to name the compound CoBr2. It begins by identifying cobalt as a transition metal and bromine as a non-metal. The process involves writing the names as they appear on the periodic table, replacing the non-metal's ending with 'ide', and considering the charge of the transition metal. Since bromine forms ions with a 1- charge and there are two bromine ions, cobalt must have a 2+ charge. Therefore, the compound is named Cobalt(II) Bromide, with the Roman numeral indicating the charge of cobalt.

What type of metal is cobalt classified as?

• Alkaline earth metal

• Noble gas

• Alkali metal

• Transition metal

What is the first step in naming CoBr2?

• Write the name of the metal

• Write the name of the non-metal

• Identify the charge of cobalt

• Change the ending of bromine to bromide

How do you modify the name of bromine when naming CoBr2?

• Add a prefix

• Change the ending to -ide

• Use a Roman numeral

• Add a suffix

Why is it necessary to include a Roman numeral in the name of CoBr2?

• To denote the molecular weight

• To indicate the number of bromine atoms

• To show the charge of cobalt

• To specify the state of matter

What charge does bromine typically form?

• 2+

• 1+

• 1-

• 2-

What is the correct name for CoBr2?

• Cobalt bromine

• Cobalt bromide

• Cobalt(II) bromide

• Cobalt(III) bromide