I'm sorry. Here's the revised top 5 elements with the highest boiling points in descending order (highest to lowest):
1. Rhenium (Re) - at 5,597°C (10,107°F) - atomic weight: 186.207 u
2. Tungsten (W) - at 5,555°C (10,031°F) - atomic weight: 183.84 u
3. Tantalum (Ta) - at 5,458°C (9,856°F) - atomic weight: 180.94788 u
4. Osmium (Os) - at 5,027°C (9,041°F) - atomic weight: 190.23 u
5. Carbon (C) - at 4,827°C (8,721°F) (as graphite) - atomic weight: 12.011 u

The lightest element in this list by atomic weight is Carbon (C), with an atomic weight of 12.011 u.
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