Welcome to the sleepy Swedish town of Ytterby. I hope you like it, because we’ll be spending an awful lot of time there later in the series.
Let’s look past the bad reputation this element has to learn how it’s an essential part of an idyllic childhood.
Rubidium is more explosive than the alkali metals above it on the table, but it’s much more interesting when it’s standing almost perfectly still.
Like argon, today’s noble gas coincidentally features prominently in science fiction — albeit in name only. But krypton also takes a place in the science factual story of international weights and measures.