Questions: State the total number of valence electrons in HNO2.

Transcript text: State the total number of valence electrons in $\mathrm{HNO}_{2}$.

Solution

Step 1: Identify the elements in $\mathrm{HNO}_{2}$ and their valence electrons

To determine the total number of valence electrons in $\mathrm{HNO}_{2}$, we first identify the elements and their respective valence electrons:

Step 2: Calculate the total number of valence electrons

Next, we calculate the total number of valence electrons by summing the valence electrons of each atom in the molecule:

$\mathrm{HNO}_{2}$ consists of 1 hydrogen atom, 1 nitrogen atom, and 2 oxygen atoms.
Total valence electrons = (1 H \times 1) + (1 N \times 5) + (2 O \times 6)

Step 3: Perform the arithmetic

Now, we perform the arithmetic to find the total number of valence electrons: \[ 1 \times 1 + 1 \times 5 + 2 \times 6 = 1 + 5 + 12 = 18 \]

\[ \boxed{18 \text{ valence electrons}} \]

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