I’d argue that Li should be red and Hg should be yellow.
Elemental mercury in liquid form is fairly safe. It needs to get into your blood in order to be a problem, and even if some does stick to your tongue and get swallowed the digestive absorption is extremely low.
My most common use for Google assistant was an extremely simple command. “Ok Google, set a timer for ten minutes.” I used this frequently and flawlessly for a long time.
Much like in your situation it just stopped working at some point. Either asking for more info it doesn’t need, or reporting success while not actually doing it. I just gave up trying and haven’t used any voice assistant in a couple of years now.