I’m getting older and the periodic table tells me so.
Do you know many of the elements in the range from atomic number 62 to 71 or any of the ones past 108?
I didn’t. I had no idea about Gadolinium, Terbium or Dysprosium and I have used the periodic table a great deal. As a young man, I could recite most of the materials up into the high 50s.
I don't hold myself responsible for knowing the unstable isotopes above 98 Californium.
Did you know that there is a Dubnium 105, a Meitnerium 109, or a whole series that begin with Un as in Ununtrium 113?
Time to take a look and stay up-to-date.