As Q-Tip once asked us...
Can I lick it?
Carl Wilhelm Scheele was likely the first person to isolate and prepare pure oxygen gas - though sadly for his historical reputation, not the first to publish his results.
Scheele also has gone down in history as a chemist known for tasting many of the chemicals that he experimented with in his laboratory.
So, can - or should - you lick the various elements?
Some -the green ones - would probably be okay. Go ahead, for example, and lick a penny. It might be germy, but the metal itself isn't going to be a problem.
Other - the yellow ones - wouldn't be great, though they're not going to immediately kill you.
The red ones will likely immediately kill you or seriously harm you without much of a doubt.
The purple ones are radioactive and will kill you quickly.
So, can you lick it?
Maybe you can.
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