Q. \(n_2\) lewis dot diagram.

In chemistry, “N” is nitrogen (nitrogen commonly has valence electrons of 5). But “n2” could also mean “\( \text{N}_2 \)” (nitrogen gas).

Below I will give the Lewis dot diagram for nitrogen gas, \( \text{N}_2 \), because “\( \text{n2} \)” most naturally refers to \( \text{N}_2 \).

Step 1: Determine the number of valence electrons

Nitrogen is in Group 15 of the periodic table.

That means each nitrogen atom has \(5\) valence electrons.

\( \text{N}_2 \) contains two nitrogen atoms, so the total valence electrons are:

\[ 2 \times 5 = 10 \]

Step 2: Decide the bonding type

Each nitrogen wants to reach the noble-gas configuration (an octet) around it.

Nitrogen typically forms a triple bond to satisfy this efficiently.

So the bonding is a triple bond between the two nitrogen atoms:

\[ :\text{N}\equiv\text{N}: \]

(The colons represent nonbonding electron pairs that will be added next.)

Step 3: Count electrons around each nitrogen

A triple bond consists of \(3\) shared pairs, which is \(6\) electrons total.

Each nitrogen then has \(3\) shared pairs, and we must add lone pairs so that each nitrogen has \(8\) electrons around it.

For a nitrogen triple bond, each nitrogen ends up with one lone pair.

Step 4: Draw the complete Lewis dot diagram

Each nitrogen shows:

• \(3\) bonding pairs in the triple bond
• \(1\) lone pair

Complete Lewis dot diagram (with lone pairs shown as pairs of dots on each nitrogen):

\[ \text{N}:\ \equiv\ \text{N}: \]

More explicitly, you can think of it as:

\[
\begin{matrix}
\cdot & & & \cdot \\
\cdot & \text{N} & \equiv & \text{N} \\
\cdot & & & \cdot
\end{matrix}
\]

In that form, the extra dots on each side represent the one lone pair on each nitrogen.

Final answer

The Lewis dot diagram for \( \text{N}_2 \) is a triple bond with one lone pair on each nitrogen:

\[ \text{N}:\ \equiv\ \text{N}: \]