6.3 Formulas and Names for Ionic Compounds

What is the chemical formula for the Ammonium ion?

• NH₃⁺

• NH₄⁺

• NH₄²⁺

• NH₃²⁺

The chemical formula for the Phosphate ion is ______.

• PO₄²⁻

• PO₃³⁻

• PO₄³⁻

• PO₃²⁻

What is the primary purpose of understanding the formation of ionic bonds?

• To write formulas for binary ionic compounds

• To understand covalent bonding

• To study metallic bonds

• To analyze molecular geometry.

What is a formula unit?

• The smallest repeating unit of a substance

• A single atom with a positive or negative charge

• A group of atoms bonded together

• An ion containing oxygen.

A monatomic ion is ​ ​ (a)  

• A single atom with a positive or negative charge
• A group of atoms bonded together

• An ion containing oxygen

• The smallest repeating unit of a substance.

Which of the following is a polyatomic ion?

• Na+

• Cl-

• SO4^2-

• O2

An oxyanion is an ion that contains ​ (a)   .

• Nitrogen

• Oxygen
• Hydrogen

• Carbon

What does IUPAC stand for?

• International Union of Physics and Chemistry

• International Union of Pure and Applied Chemistry

• International Union of Practical and Applied Chemistry

• International Union of Pure and Analytical Chemistry

Using the IUPAC naming system, you can write a chemical formula from a compound’s name and name a compound given its ________.

• atomic number

• chemical formula

• molecular weight

• electron configuration

The overall charge of a formula unit is always ____.