Here's how to draw the Lewis electron-dot diagram for sulfur-33:

1. Determine the number of valence electrons:

* Sulfur (S) is in group 16 (VIA) of the periodic table, meaning it has 6 valence electrons.

* The isotope number (33) doesn't affect the number of valence electrons.

2. Draw the symbol:

* Write the symbol for sulfur: "S"

3. Place dots around the symbol:

* Start by placing one dot on each side of the symbol (top, bottom, left, right).

* Then, add two more dots to the top and bottom, forming pairs.

The Lewis electron-dot diagram for sulfur-33 looks like this:

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:S:

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