Calcium Phosphide and Ionic Bonds

The video tutorial explains the Lewis structure of calcium phosphide (Ca3P2), an ionic compound formed by the transfer of electrons from calcium (a metal) to phosphorus (a non-metal). It details the valence electrons of calcium and phosphorus, the formation of ionic bonds, and the resulting charge distribution. The tutorial also describes the crystal structure of solid calcium phosphide, emphasizing the repeating pattern of the formula unit.

What type of compound is calcium phosphide (Ca3P2)?

• Covalent compound

• Ionic compound

• Metallic compound

• Molecular compound

How many valence electrons does each calcium atom have?

• One

• Two

• Three

• Four

In which group of the periodic table is phosphorus found?

• Group 10

• Group 18

• Group 15

• Group 2

How many electrons does each phosphorus atom gain in the formation of Ca3P2?

• Two

• One

• Three

• Four

What charge does each calcium ion have after losing electrons?

• 3+

• 2+

• 4+

• 1+

What is the charge on each phosphorus ion in Ca3P2?

• 4-

• 3-

• 2-

• 1-

Why are brackets used around ions in the Lewis structure of Ca3P2?

• To indicate shared electrons

• To show the ionic nature

• To highlight covalent bonds

• To denote metallic bonds

What type of bond is formed between calcium and phosphorus in Ca3P2?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

What is the significance of the formula unit in the context of solid calcium phosphide?

• It describes the molecular weight

• It indicates the number of atoms in a molecule

• It shows the smallest repeating unit in the crystal

• It represents a single molecule

What would be the physical state of calcium phosphide in a sample?

• Plasma

• Liquid

• Solid

• Gas