Chromium Compounds and Charges

The video tutorial explains how to name the compound CR2O3 by identifying it as an ionic compound composed of a metal (chromium) and a non-metal (oxygen). The process involves recognizing the charges of the elements, particularly the transition metal chromium, which can have multiple charges. By balancing the charges of chromium and oxygen, the compound is named Chromium 3 Oxide, with the Roman numeral indicating the charge of the chromium atoms.

What type of compound is Cr2O3?

• Metallic compound

• Ionic compound

• Covalent compound

• Molecular compound

Which element is named first in the compound Cr2O3?

• Chromium

• Carbon

• Hydrogen

• Oxygen

What suffix is used for the non-metal in Cr2O3?

• -ide

• -ite

• -ate

• -ous

Why can chromium have different charges?

• It is a non-metal

• It is a transition metal

• It is a noble gas

• It is an alkali metal

What is the ionic charge of oxygen in Cr2O3?

• 1+

• 1-

• 2-

• 2+

How many oxygen atoms are present in Cr2O3?

• 4

• 3

• 2

• 1

What is the total negative charge contributed by oxygen in Cr2O3?

• 10-

• 4-

• 6-

• 8-

What Roman numeral is used to indicate the charge of chromium in Cr2O3?

• V

• IV

• III

• II

What is the full name of the compound Cr2O3?

• Chromium(IV) oxide

• Chromium(II) oxide

• Chromium(III) oxide

• Chromium(V) oxide