Lithium and Phosphorus Compounds

The video tutorial explains how to write the formula for lithium phosphide, an ionic compound. It begins by identifying lithium as a metal and phosphorus as a non-metal, forming an ionic compound. The tutorial then details the process of naming the compound Li3P as lithium phosphide, using the periodic table. Finally, it explains how to write the formula by balancing the charges of lithium and phosphide ions, resulting in the formula Li3P.

What type of compound is formed between lithium and phosphorus?

• Covalent compound

• Metallic compound

• Molecular compound

• Ionic compound

How is the name of the metal written in the compound Li3P?

• In lowercase letters

• With a prefix indicating the number of atoms

• As it appears on the periodic table

• With a suffix '-ide'

What is the correct suffix for the non-metal in the compound Li3P?

• -ite

• -ide

• -ate

• -ous

What is the charge of a lithium ion?

• 0

• 1+

• 3-

• 2+

How many lithium ions are needed to balance one phosphide ion?

• One

• Two

• Three

• Four

What is the charge of a phosphide ion?

• 0

• 3-

• 1+

• 2-

What is the chemical formula for lithium phosphide?

• LiP

• Li4P

• Li2P

• Li3P