Atomic mass327 octillionths kg
60.6 octillionthsUnabridged dictionaries
1.1 octillionthsFull bathtubs
3.3 septillionthsSlices of New York pizza
196.97 u
Photo from Wikimedia Commons
Atom of Gold
The quantum sparkle behind a noble metal/Scientific Objects
A gold atom has 79 protons, 118 neutrons, and 79 electrons. Its atomic radius is about 144 picometers, and it has a mass of roughly 3.27 x 10^-25 kg. Gold's distinctive yellow color comes from relativistic effects on its electrons. Without Einstein's relativity, gold would look silver.
Measurements
Atomic radius (metallic)144 trillionths m
1.7 trillionthsOlympic straights
360 quadrillionthsSupertankers
514 trillionthsPaper towel sheets
144 pm
Van der Waals radius166 trillionths m
1.9 billionthsCrayons
69.2 trillionthsCorn stalk heights
166 pm
Nuclear radius6.2 quadrillionths m
3 quadrillionthsSurfboards
7.7 quadrillionthsSkateboard lengths
6.23 fm
First ionization energy1.5 quintillionths J
1.5 millionWiFi photons
12.8 sextillionthsThrown baseballs
9.22 eV