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Why Gold is Money: A Periodic Perspective

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Why Gold is Money: A Periodic Perspective

Why Gold is Money

The economist John Maynard Keynes famously called gold a “barbarous relic”, suggesting that its usefulness as money is an artifact of the past. In an era filled with cashless transactions and hundreds of cryptocurrencies, this statement seems truer today than in Keynes’ time.

However, gold also possesses elemental properties that has made it an ideal metal for money throughout history.

Sanat Kumar, a chemical engineer from Columbia University, broke down the periodic table to show why gold has been used as a monetary metal for thousands of years.

The Periodic Table

The periodic table organizes 118 elements in rows by increasing atomic number (periods) and columns (groups) with similar electron configurations.

Just as in today’s animation, let’s apply the process of elimination to the periodic table to see why gold is money:

  • Gases and Liquids
    Noble gases (such as argon and helium), as well as elements such as hydrogen, nitrogen, oxygen, fluorine and chlorine are gaseous at room temperature and standard pressure. Meanwhile, mercury and bromine are liquids. As a form of money, these are implausible and impractical.
  • Lanthanides and Actinides
    Next, lanthanides and actinides are both generally elements that can decay and become radioactive. If you were to carry these around in your pocket they could irradiate or poison you.
  • Alkali and Alkaline-Earth Metals
    Alkali and alkaline earth metals are located on the left-hand side of the periodic table, and are highly reactive at standard pressure and room temperature. Some can even burst into flames.
  • Transition, Post Transition Metals, and Metalloids
    There are about 30 elements that are solid, nonflammable, and nontoxic. For an element to be used as money it needs to be rare, but not too rare. Nickel and copper, for example, are found throughout the Earth’s crust in relative abundance.
  • Super Rare and Synthetic Elements
    Osmium only exists in the Earth’s crust from meteorites. Meanwhile, synthetic elements such as rutherfordium and nihonium must be created in a laboratory.

Once the above elements are eliminated, there are only five precious metals left: platinum, palladium, rhodium, silver and gold. People have used silver as money, but it tarnishes over time. Rhodium and palladium are more recent discoveries, with limited historical uses.

Platinum and gold are the remaining elements. Platinum’s extremely high melting point would require a furnace of the Gods to melt back in ancient times, making it impractical. This leaves us with gold. It melts at a lower temperature and is malleable, making it easy to work with.

Gold as Money

Gold does not dissipate into the atmosphere, it does not burst into flames, and it does not poison or irradiate the holder. It is rare enough to make it difficult to overproduce and malleable to mint into coins, bars, and bricks. Civilizations have consistently used gold as a material of value.

Perhaps modern societies would be well-served by looking at the properties of gold, to see why it has served as money for millennia, especially when someone’s wealth could disappear in a click.

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Visualizing All of the U.S. Currency in Circulation

This graphic illustrates the amount of U.S. currency in circulation globally, by denomination, based on data from the Federal Reserve.

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Visualizing All of the U.S. Currency in Circulation

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

Have you ever wondered how much U.S. currency is in circulation?

Every year, the U.S. Federal Reserve submits a print order for U.S. currency to the Treasury Department’s Bureau of Engraving and Printing (BEP). The BEP will then print billions of notes in various denominations, from $1 bills to $100 bills.

In this graphic, we’ve used the latest Federal Reserve data to visualize the approximate number of bills for each denomination globally, as of Dec. 31, 2022.

Breakdown of U.S. Currency in Circulation

The following table lists all of the data we used to create the visualization above. Note that value figures were rounded for simplicity.

Type of BillNumber of notes
in circulation (billions)
Value ($B)
$114.3$14B
$21.5$3B
$53.5$18B
$102.3$23B
$2011.5$230B
$502.5$125B
$10018.5$1,850B
$500-10,000*0.0004n/a

*$500-10,000 bills are listed as a range, and a total circulation of 0.0004 billion. Not included in graphic.

From these numbers, we can see that $100 bills are the most common bill in circulation, even ahead of $1 bills.

One reason for this is $100 bills have a longer lifespan than smaller denominations, due to people using $100 bills less often for transactions. Some businesses may also decline $100 bills as payment.

Based on 2018 estimates from the Federal Reserve, a $100 bill has a lifespan of over 20 years, which is significantly higher than $1 bills (7 years) and $5 bills (5 years).

If you’re interested in more visualizations on the U.S. dollar, consider this animated chart which shows how the dollar overtook the British pound as the world’s most prominent reserve currency.

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