Rankle #147 answer: standard atomic weight (lowest to highest)

The answer

Rank by standard atomic weight (lowest to highest)

1. 1Hydrogen1.008 amu
2. 2Helium4.0026 amu
3. 3Carbon12.011 amu
4. 4Oxygen15.999 amu

Why this order

Ranked lowest to highest, Hydrogen (1.008 amu) goes at the top and Oxygen (15.999 amu) at the bottom.

The closest call is Carbon (12.011 amu) against Oxygen (15.999 amu), about 33% apart. That is the swap most likely to cost a point.

The biggest gap is between Hydrogen and Helium, about 4 times apart, so that boundary should be the easiest part of the order to get right.

From top to bottom the figures span a factor of roughly 16.

These are the figures the game reveals after you submit. They are rounded; only the order is scored.

Difficulty: medium, judged by how close the tightest pair is.

Similar puzzles: Rankle #16.

How it was scored

right slot, one place out, two or more out. The score is how many items sit in the right slot, and only 4/4 is a win. Full rules on the how to play page.