Chromium 3 Carbonate Concepts

The video tutorial explains how to write the formula for chromium 3 carbonate. It begins by identifying the element symbol for chromium and its ionic charge, followed by the carbonate ion, which is a polyatomic ion. The tutorial then demonstrates the crisscross method to balance the charges of the ionic compound, ensuring a net charge of zero. Finally, the formula is verified, confirming the correct composition of chromium 3 carbonate.

What is the element symbol for chromium?

• Cr

• Ch

• Cm

• C

What does the Roman numeral III indicate in Chromium 3 Carbonate?

• The ionic charge of chromium

• The number of chromium atoms

• The number of carbonate ions

• The atomic number of chromium

What is the charge of the carbonate ion?

• 2-

• 1-

• 3-

• 2+

Which method is used to balance the charges in Chromium 3 Carbonate?

• Cross-multiplication

• Crisscross method

• Substitution method

• Balancing method

Why do we use parentheses around the carbonate ion in the formula?

• To separate it from chromium

• To denote its charge

• To show it is a single ion

• To indicate it is a polyatomic ion

How many carbonate ions are present in the formula for Chromium 3 Carbonate?

• Four

• Three

• Two

• One

What is the net charge of the Chromium 3 Carbonate compound?

• +1

• 0

• +2

• -1

How many chromium atoms are present in the formula for Chromium 3 Carbonate?

• Four

• Two

• One

• Three

What is the correct formula for Chromium 3 Carbonate?

• Cr3(CO3)2

• CrCO3

• Cr2(CO3)3

• Cr(CO3)2