The video tutorial explains how to write the Lewis structure for sodium sulfide (Na2S). It covers the concept of ionic compounds, where sodium transfers its valence electrons to sulfur, resulting in a positive charge for sodium and a negative charge for sulfur. The tutorial details the electron transfer process and how to represent it in a Lewis structure. It concludes with an explanation of formula units and how they form a crystal structure.

What type of compound is Na2S?

• Molecular

• Metallic

• Ionic

• Covalent

Which group does sodium belong to on the periodic table?

• Group 1

• Group 16

• Group 2

• Group 17

How many valence electrons does sulfur have?

• 2

• 8

• 1

• 6

What happens to sodium when it transfers its electron to sulfur?

• It becomes positively charged

• It becomes negatively charged

• It gains more electrons

• It remains neutral

What charge does sulfur acquire after gaining electrons from sodium?

• Two minus

• One minus

• Neutral

• Positive

What is the purpose of brackets in the Lewis structure of Na2S?

• To indicate the number of atoms

• To show the charge of ions

• To represent covalent bonds

• To highlight the central atom

What is a formula unit in the context of Na2S?

• An isolated atom

• A covalent bond

• A repeating pattern in a crystal

• A single molecule

How does understanding the Lewis structure help in chemistry?

• It predicts the color of compounds

• It explains the transfer of valence electrons

• It shows the physical properties of compounds

• It determines the melting point