Calcium and Ionic Compounds Concepts

The video tutorial explains how to write the Lewis structure for calcium oxide (CaO). It begins by identifying calcium as a metal and oxygen as a non-metal, forming an ionic compound. The tutorial details the valence electrons of calcium and oxygen, and how calcium transfers electrons to oxygen, resulting in ionic bond formation. The video also highlights the crystal structure of calcium oxide, emphasizing that it consists of repeating formula units. The tutorial concludes with a brief summary and thanks to the viewers.

What type of compound is formed between calcium and oxygen?

• Metallic compound

• Ionic compound

• Molecular compound

• Covalent compound

In which group of the periodic table is calcium found?

• Group 18

• Group 16

• Group 2

• Group 1

How many valence electrons does oxygen have?

• 8

• 6

• 4

• 2

What charge does calcium have after losing electrons?

• 2+

• 2-

• 1-

• 1+

Why are brackets used around the oxygen ion in the Lewis structure?

• To denote its mass

• To highlight its atomic number

• To show it is an ion

• To indicate it is a molecule

What is the result of the attraction between positive and negative charges in ionic compounds?

• Formation of covalent bonds

• Formation of ionic bonds

• Formation of hydrogen bonds

• Formation of metallic bonds

What is the typical structure of calcium oxide in nature?

• Crystalline

• Amorphous

• Molecular

• Gaseous

What is a formula unit in the context of ionic compounds?

• A repeating unit in a crystal

• A single atom

• A covalent bond

• A molecule

Which of the following best describes the nature of the bond in calcium oxide?

• Covalent

• Hydrogen

• Metallic

• Ionic