The best way to remember is to memorize the whole thing.
By solving the problem repeatedly, you can use it for studying for the test and preparing for the exam.

[How to enter the answer]
If they do not match exactly, the answer will not be correct.
Please be careful.
(example)
● When answering the element symbol of "silicon"
○ (Correct answer) ・ ・ ・ Si (Enter in half-width characters, uppercase and lowercase letters)
× (Incorrect answer) ・ ・ ・ Si (Enter in full-width), SI (I is uppercase), si (S is lowercase), etc.

● When answering the element name of "Si"
○ (Correct answer) ・ ・ ・ Silicon (Display according to the periodic table)
× (Incorrect answer) ・ ・ ・ Notation such as silicon, silicon, and keiso

Make sure to remember the notation according to the periodic table.