Eli5: why is the base SI unit of mass a kilogram, not a gram?

Question

No other base units have a prefix, so why does mass?

In: 188

Answer 1

Quora said at the time of making the standards, we used a grave (which was equal to 1000 grams). It goes on that the gram was not used at the time because it was too small to measure reliably, so they went with the grave. It was switched to “kilogram” to use the standard prefix naming convention.