Ammonium Ion and Lewis Structures

The video tutorial explains the structure of the ammonium ion, focusing on the central nitrogen atom surrounded by four hydrogen atoms. It discusses the valence electron count and how to adjust it for cations and anions. The process of constructing a Lewis structure is detailed, including bonding and electron pair distribution. Finally, it covers the notation for indicating ion charge in Lewis structures, emphasizing the use of brackets and superscripts.

What is the central atom in the ammonium ion?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon

How many hydrogen atoms are present in the ammonium ion?

• Two

• Three

• Four

• Five

What is the valence electron count for nitrogen in the ammonium ion?

• 3

• 5

• 7

• 9

How do you adjust the electron count for a cation?

• Halve the electrons

• Double the electrons

• Remove electrons

• Add electrons

What is the total number of valence electrons in the ammonium ion before adjustment?

• 8

• 9

• 10

• 6

What is the first step in creating a Lewis structure for the ammonium ion?

• Distribute electrons

• Calculate total charge

• Bond hydrogen to nitrogen

• Add brackets

How many pairs of electrons are distributed in the ammonium ion's Lewis structure?

• 4 pairs

• 3 pairs

• 2 pairs

• 5 pairs

What should be added to the Lewis structure to indicate it is an ion?

• Brackets and superscript

• A circle

• A line

• A star

Why might the method of indicating charge in a Lewis structure vary?

• Different atomic numbers

• Different online homework systems

• Different molecular weights

• Different chemical properties