Valence Electrons and Lewis Structures

The video tutorial explains how to write the Lewis structure for H2F+. It begins by calculating the total valence electrons, considering the loss of an electron due to the positive charge. The fluorine atom is placed at the center, with hydrogen atoms on the outside. Valence electrons are used to form bonds between hydrogen and fluorine, and the octet rule is applied to complete fluorine's electron shell. The structure is finalized by adding brackets to indicate the ion and a plus sign outside the brackets.

What is the valence electron count for a single hydrogen atom?

• 3

• 2

• 4

• 1

How many valence electrons does fluorine have?

• 7

• 5

• 6

• 8

What does the positive charge in H2F+ indicate?

• Gain of an electron

• Loss of an electron

• Gain of a proton

• Loss of a proton

How many total valence electrons are there in H2F+?

• 8

• 9

• 6

• 7

Where is fluorine placed in the Lewis structure of H2F+?

• Below hydrogen

• On the outside

• Above hydrogen

• In the center

How many valence electrons are used to form bonds between hydrogen and fluorine?

• 2

• 4

• 6

• 8

What is the total number of valence electrons used to complete the octet for fluorine?

• 8

• 6

• 4

• 2

Why should brackets be placed around the Lewis structure of H2F+?

• To separate hydrogen and fluorine

• To highlight the central atom

• To show it is an ion

• To indicate it is a molecule