Ionic Bonding and Electron Transfer

This video tutorial explains the dot and cross diagram for sodium oxide. It begins with an introduction to the periodic table and how to determine the number of electrons in an atom. The video then focuses on sodium's electron configuration, its desire to donate an electron, and oxygen's need to gain electrons to achieve an octet configuration. The formation of sodium ions and oxide ions is explained, along with the calculation of their charges. The video also covers how to represent these charges in dot and cross diagrams and concludes with a summary of ionic bonding principles.

What information does the top number in the periodic table provide about an atom?

• Number of neutrons

• Number of electrons

• Atomic mass

• Number of protons

How many electrons does sodium have in its outermost shell?

• One

• Two

• Eight

• Eleven

Why does sodium tend to donate its outermost electron?

• To increase its atomic number

• To achieve a full outer shell

• To become a non-metal

• To decrease its atomic mass

How many electrons does oxygen need to achieve an octet configuration?

• One

• Two

• Three

• Four

What is the charge of a sodium ion after it donates an electron?

• Negative two

• Positive one

• Negative one

• Positive two

What is the overall charge of an oxide ion after gaining electrons?

• Negative one

• Positive one

• Positive two

• Negative two

What is the charge of a sodium atom before it donates an electron?

• Zero

• Positive one

• Positive eleven

• Negative one

What holds the oppositely charged ions together in an ionic bond?

• Magnetic forces

• Gravitational forces

• Electrostatic forces

• Nuclear forces

What is the main focus of the video tutorial?

• Covalent bonding

• Dot and cross diagrams of sodium oxide

• Metallic bonding

• Periodic table trends

What is the purpose of using dots and crosses in the diagram?

• To represent protons and neutrons

• To show the atomic mass

• To indicate atomic number

• To illustrate electron transfer