In such cases, the multiphase imaging method will be very effective in order to compress this information. You need to remember 14 and their characteristics. You can reduce the number of loci to 7. Think of any sequence of 14 images, memorize them 2 per loci. Then highlight on each of the details. Increase the details and link the name of the element and their characteristics to them.
For example, the first image is a car. I highlight in it the bumper, hood, cab, trunk. We increase the bumper. Chlorine reminds me of detergents, and Fluorine is a poisonous gas. As a result, on this huge bumper there is a toxin rebel from the game Generals who is trying to wash it with detergent. Then I open the hood and an almost colorless ghost flies out of it (my association with colorless gas).
Then I move on to another image. Let it be a barrier. I also highlight the details on it and store the BrF data on them. This method, invented by Vladimir Kozarenko in the 90s, remains the most perfect system for memorizing large volumes of educational information.
I also strongly recommend remembering the entire periodic table and have steel images for each element, as we do with numbers. Because memorizing the details of the image already requires more stress on the imagination and more time.