The spacing between gold atoms in crystal is 288.4 pm.
You have: gold gram / ((288.4 pm)^2) avogadro mol You want: troyounce / m^2 * 0.00012642764
Gold electroplating at one atom thick requires 0.00012642764 troy ounces of gold per square meter. At $1166.34 per ounce, that's 14.7 cents per square meter, or $597 per acre.
Gold is shiny and does not corrode.
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