Albert Einstein: “Never memorize something that you can look up.”
Why would anyone want to memorize the periodic table?
I know where Hydrogen and Helium are. Carbon, Oxygen, and Nitrogen are in the air and are somewhere in the top right.
Iron, Gold, Silver, Lead – they are in the middle somewhere.
Iron is Fe, Gold and Silver are Au and Ag (which is which, I don’t remember nor care), and Lead is Pb. I remember these cause they aren’t based on English.
Atomic weights, number of protons, isotopes – all stuff to look up.
If you become a jeweler, you might want to memorize the properties of the metals used in jewelry – which will only be a dozen or so.